Denge.

FAQ

Answers to thequestions on your mind.

The most asked questions from every section of the atlas, on one page. For more, look at the questions at the end of each related guide.

Conditions

How can I tell if my acne is hormonal?+

If your breakouts mostly cluster along the jawline, under the chin and on the neck, flare before your period and tend to be deep and painful, a hormonal influence may be at play. A dermatologist makes the definitive assessment and may order hormone tests if needed.

I started treatment and my skin got worse in the first weeks. Is that normal?+

Especially with retinoids, dryness, redness and a temporary increase in breakouts can happen in the first 2–6 weeks. Don't skip moisturizer during this period, and talk to your dermatologist instead of stopping treatment on your own.

Does rosacea ever go away completely?+

Rosacea is a chronic condition that comes and goes in flare-ups and calm periods. But with the right treatment, avoiding triggers and barrier care, most women can keep their symptoms well under control for long periods.

Can I wear makeup?+

Yes. Fragrance-free, mineral-based products and green-tinted color correctors help cover redness. Removing makeup gently is just as important as the makeup itself.

Can you get atopic dermatitis for the first time as an adult?+

Yes. Although atopic dermatitis usually starts in childhood, it can appear for the first time in adulthood. Global data show a second rise in how often the disease occurs in middle age and later.

Which moisturizer should I choose?+

Fragrance-free, dye-free formulas with humectants like ceramides and glycerin and barrier-supporting lipids are a good start. For very dry areas, a cream or ointment is more effective than a lotion.

Are dandruff and seborrheic dermatitis the same thing?+

They're two ends of the same spectrum. Dandruff is flaking and itching only on the scalp, without visible inflammation. Seborrheic dermatitis involves redness and inflammation and can also affect other areas, such as the face, behind the ears and the chest.

How often should I wash my hair?+

With seborrheic dermatitis, washing your hair more often is usually helpful, since sebum buildup feeds the yeast. You can use the treatment shampoo on the recommended days and a gentle shampoo in between.

How long does perioral dermatitis take to go away?+

With the right treatment and a minimal skincare routine, clear improvement is usually seen within a few weeks to a few months. If you've stopped cortisone, there may be a temporary flare-up in the first weeks.

Can I wear makeup?+

Keeping makeup to a minimum during treatment speeds up healing. If you need to, choose lightweight, mineral-based, fragrance-free products and remove them gently at the end of the day.

How do I know if I have sensitive skin?+

If many products make your skin sting or burn, you flush easily in wind and cold and your skin feels tight after washing, and there's no visible disease on your skin, you may have sensitive skin. A dermatologist assesses whether there's another underlying condition.

Are sensitive skin and allergy the same thing?+

No. An allergy is the immune system's specific reaction to a particular substance and can be identified with a patch test. Sensitive skin is a general sensitivity to many different stimuli.

How do I know if my skin barrier is damaged?+

If products you normally use comfortably have started to sting, your skin feels tight after washing, redness and flaking are increasing and your skin feels both dry and oily, your barrier may be worn down.

How long does it take to repair the barrier?+

The skin's outer layer renews itself in a cycle of about a few weeks. With a simplified routine, most people feel noticeable relief within 2–4 weeks; with deeper damage, it may take longer.

Does melasma go away on its own after giving birth?+

Some of the patches that start during pregnancy fade on their own in the months after birth. But if you don't protect yourself from the sun or if you have a genetic predisposition, the patches can become permanent. You can ask your dermatologist which treatments you can use while breastfeeding.

Which sunscreen should I choose?+

Choose a broad-spectrum, high-protection and, if possible, tinted cream, meaning one with iron oxides. Iron oxide creates an extra shield against visible light. Applying enough cream and reapplying it during the day is just as important as a high protection factor.

Do post-inflammatory dark spots go away on their own?+

Spots in the upper layer often fade on their own within months. But the time stretches out if you go into the sun unprotected and if the inflammation keeps coming back. Deep gray-blue spots fade much more slowly and may need a dermatologist's help.

Is there a difference between red marks and brown marks?+

Yes. The pink-red marks left after a pimple usually come from small dilated blood vessels; brown marks are excess pigment. Because their treatments are different, it's important to know which is which.

Does dandruff cause hair loss?+

Dandruff doesn't directly cause hair loss. But severe itching and inflammation make the scalp uncomfortable, and scratching can break hair strands. Keeping your scalp healthy helps your hair look better.

Is dandruff contagious?+

No. The yeast linked to dandruff is naturally found on everyone's scalp. Sharing a comb doesn't spread dandruff; still, using your own comb is good for personal hygiene.

Can female pattern hair loss be reversed?+

In most women, treatments help stop the thinning and preserve hair density; in mild and moderate cases some fullness can also be regained. Treatments started early are more successful.

When does minoxidil start working?+

Its effect is usually noticed within a few months. A temporary increase in shedding may be seen in the first weeks; this is related to the start of a new growth cycle. Follow your dermatologist's advice on use and duration.

How long does telogen effluvium last?+

In acute telogen effluvium, shedding usually slows within 6 months. It can take anywhere from months to a year or two for new hair to reach its old length and fullness. If the trigger continues, shedding may last longer.

How much hair loss a day is normal?+

Losing some hair every day is a natural part of the hair cycle. What matters is whether there's a noticeable increase compared with your own normal and a decrease in hair density.

How can I tell psoriasis from eczema?+

Psoriasis plaques usually have sharp borders, are thick and have silvery scales; they're common on the elbows, knees and scalp. Eczema tends to appear more in skin folds, with poorly defined, itchy areas prone to oozing. A dermatologist should make the distinction.

Does psoriasis affect pregnancy?+

Most women with psoriasis have healthy pregnancies. However, some treatments can't be used during pregnancy; if you're planning a pregnancy, review your treatment with your dermatologist in advance.

How can I tell irritation from allergy?+

Irritant dermatitis usually starts shortly after contact, causes more burning and dryness, and can happen to anyone who touches the substance. Allergic dermatitis is a rash that appears 1–3 days after contact, is itchier and can spread beyond the contact area. A patch test is needed for a definite distinction.

How is a patch test done?+

The dermatologist sticks small patches containing common allergens on your back. The patches are usually removed after 2 days, and the skin is assessed on days 2–4. During the test you shouldn't get your back wet and should try not to sweat.

Does keratosis pilaris ever go away completely?+

There's no definite timeline for it 'going away'. In a follow-up study in the UK, some patients saw clear improvement with age, with an average age of improvement reported as 16; for others it continued unchanged. With regular care, its appearance can be largely kept under control.

How soon will I see a difference?+

When you use keratin-softening lotions every day, you can usually feel a difference to the touch within 3-4 weeks. Redness and discoloration improve more slowly, over 2-3 months.

Is folliculitis contagious?+

Bacterial folliculitis can, though rarely, spread through shared towels, razors and loofahs. That's why not sharing personal items is a good habit. The yeast-related and shaving-related types aren't contagious.

How can I tell if it's caused by yeast?+

Itching, small bumps that look very much alike, and placement on the upper back, chest and hairline are important clues. A definite diagnosis requires your dermatologist to do a simple microscopic exam.

I have PCOS. Will I definitely get acne?+

No. PCOS has four different phenotypes, and skin findings differ from woman to woman. Some women only have irregular periods, while others have noticeable acne and unwanted hair.

Is my hair loss caused by PCOS?+

It might be, but iron deficiency, thyroid problems and stress also cause hair loss. Experts recommend that women with hair loss be evaluated not only for androgen excess but also for iron, vitamin D, zinc, thyroid and prolactin levels.

Does the pregnancy mask go away after giving birth?+

For many women, the patches lighten noticeably in the months after giving birth. For lasting patches, your dermatologist may recommend stronger treatments once breastfeeding is over. Throughout this process, sun protection is the most effective step.

Which sunscreen should I choose during pregnancy?+

Mineral sunscreens containing zinc oxide or titanium dioxide are often preferred because they stay on the skin, reflect light and are better tolerated by sensitive skin. Tinted formulas also give extra protection against visible light, which is an advantage if you're prone to pigmentation.

I don't understand why my skin suddenly became sensitive in menopause.+

When estrogen drops, barrier lipids decrease, the skin gets thinner and repair slows down. That's why even products you used without problems before can burn and sting. Simplifying your routine and focusing on barrier repair usually makes a difference within a few weeks.

Will hormone therapy make my skin look younger?+

Studies show that hormone therapy can have a positive effect on skin collagen and thickness. However, this treatment is recommended by your OB-GYN for overall menopause symptoms, not for your skin, after assessing your personal risks.

How can I tell what type of dark circles I have?+

If the color lightens when you gently stretch the skin under your eye with your finger, a structural or vascular component may dominate; if it doesn't change, a pigment component may dominate. A shadow that becomes more noticeable when light comes from above points to a tear trough and volume loss. Your dermatologist makes the definitive distinction.

Do I really need an eye cream, or can I use my face cream?+

A simple face cream that doesn't irritate can be used around the eyes. The advantage of eye creams is that they're tested for the eye area and are generally lower-strength and fragrance-free.

At what age should I start anti-aging skincare?+

You should start sun protection at any age. Active ingredients such as retinoids can generally be added from your mid-20s onward, depending on your skin's needs. What really matters is consistency more than starting early.

Retinol or a prescription retinoid?+

Prescription tretinoin is the strongest and most researched option, but it has a higher risk of irritation. Retinol and retinaldehyde offer a gentler start. You can decide with your dermatologist which one is right for you.

Skin types

I have normal skin. Do I really need a serum?+

It's not essential. A gentle cleanser, moisturizer and sunscreen are the basic trio. A serum makes sense if you have a specific goal (such as radiance or preventive anti-aging care).

Can my skin type change over time?+

Yes. Hormones, pregnancy, age, climate and the products you use all affect your skin type. Skin that is normal in your 20s may tend toward dryness in your 40s; repeating the blotting paper test once a year is a good idea.

Is dry skin the same as dehydrated skin?+

No. Dry skin is a lack of oil and is usually a lasting skin type. Dehydrated skin is a lack of water and can appear temporarily even in oily skin. Dry skin needs more lipid support, dehydrated skin more water support; often the two occur together.

Will drinking lots of water fix my dry skin?+

Getting enough fluids is important for overall health, but on its own it won't fix dry skin. The real cause of dryness is a lack of barrier lipids and humectants; you need support from the outside.

Why does my oily skin get oily in winter but also feel tight?+

This is the picture of oily but dehydrated skin. Even though there's oil on the surface, you lose water because the barrier is weakened. Light but regular moisturizing and dropping harsh products usually bring back the balance.

Can I use salicylic acid every day?+

Some skin tolerates it, but starting every other day is safer. If you get dryness, stinging or flaking, use it less often.

Should I buy two separate moisturizers for combination skin?+

Not necessarily. Applying a light moisturizer to your whole face and a second layer of the same product to your cheeks is often enough. In winter, a separate, richer cream for your cheeks makes things easier.

Is it combination skin or oily but dehydrated skin?+

With oily but dehydrated skin, the whole face gets oily but feels tight. With combination skin, the cheeks don't get oily. If the cheek tissue comes away clean in the blotting paper test, combination skin is likely.

Is sensitive skin the same as allergic skin?+

No. Sensitive skin has sensory reactions such as stinging and burning to many triggers. With an allergy, the immune system reacts to a specific substance, causing itchy, raised, eczema-like patches. If an allergy is suspected, your dermatologist can do a patch test.

Will a product labeled hypoallergenic definitely suit me?+

No. The term means efforts were made to lower the risk of reaction, but it's not a guarantee. Still check the ingredient list and try it on a test area.

Is it too late to start retinol?+

No. Studies report that retinol can have positive effects on fine wrinkles and collagen production even in people over 80. Start with a low dose and go slowly.

Do collagen creams add collagen to the skin?+

The collagen molecule is too large to pass into the deeper layers of the skin. In creams, it works as a humectant. To support your own collagen production, retinoids, vitamin C, peptides and sun protection make more sense.

Hair and scalp

Is it bad to wash my straight hair every day?+

Not as long as you use a gentle shampoo. Research shows that the belief that frequent washing damages hair isn't backed by strong evidence. If your scalp gets oily within a day, keeping it clean can also help reduce the tendency toward itching and dandruff.

If I wash my hair less often, will it get used to producing less oil?+

Your scalp's oil production is largely determined by hormones and genetics; it doesn't permanently decrease from washing less often. You simply carry the built-up oil for longer. Switching to a gentler shampoo is a more effective way to reduce that oily feeling.

I just realized my hair is wavy. Is that possible?+

Yes, it's very common. When wavy hair has been brushed and straightened for years or cared for with heavy products, the waves can't come through. If you detangle gently while wet for a few weeks and let it air-dry with light products, your waves may become more defined.

How do I reduce frizz in wavy hair?+

Frizz mostly comes from a lack of moisture and from friction. Not skipping conditioner, applying a light-hold styler to wet hair, using a microfiber towel and not touching your hair while it dries are the most effective steps.

How often should I wash my curly hair?+

For most curly hair, shampooing once or twice a week is enough. But if your scalp is oily, itchy or flaky, you'll need to wash more often. The measure isn't the calendar; it's how comfortable your scalp feels.

Can co-washing replace shampoo?+

Not completely. Non-lathering cleansing conditioners soften the lengths, but they may not clean oil and product buildup from the scalp well enough. Research stresses that this method may fall short on oily and flaky scalps. Alternating it with shampoo is the most balanced approach.

Are fine hair and thinning hair the same thing?+

No. Fine hair means individual strands are thin, and it's usually something you're born with. Thinning (low-density) hair means there are fewer strands on your scalp. The two can occur together. If your hair has noticeably decreased recently, this may be a sign of thinning.

How much hair shedding per day is normal?+

Losing about 50–100 strands a day is considered normal. If you're seeing noticeably more hair when combing and washing, your scalp has become more visible or the shedding has been going on for weeks, it's a good idea to see a dermatologist.

Why doesn't my thick hair absorb products?+

In thick, low-porosity hair the cuticle scales are tightly closed, so products sit on the surface. Applying products to hair dampened with lukewarm water, leaving masks on under a warm towel and using small amounts more often all help.

What happens if I go to bed with my dense hair wet?+

Your scalp stays damp and warm for hours. In some people, this can increase the tendency toward itching, odor and dandruff. Wet hair also breaks more easily as it rubs against the pillow. Drying at least your roots before bed is a good habit.

Do I need a sulfate-free shampoo for colored hair?+

It's not a must, but it's usually helpful. Strong sulfates can strip color faster and dry out damaged strands. A shampoo with mild surfactants and a mildly acidic pH helps extend the life of your color.

My bleached hair stretches like gum when wet. What should I do?+

This is a sign that the cortex has been seriously weakened. Stay away from heat and new chemical treatments for a while, focus on protein and bond-building treatments, and be very gentle with your hair when it's wet. If breakage continues, trimming the damaged ends is the healthiest solution.

Does washing my hair every day make it oilier?+

This is a common belief, but it isn't backed by strong evidence. Oil production is largely determined by hormones and genetics. Washing every day with a gentle shampoo is a safe way to keep an oily scalp clean and comfortable.

My scalp is oily but my lengths are dry. What should I do?+

This is very common. Apply shampoo only to your scalp and conditioner only to your lengths and ends. Choose gentle, balancing products for your scalp and lightly moisturizing products for your lengths.

How can I tell a dry scalp from dandruff?+

Dry scalp flakes are usually small, fine, white and dry; the scalp feels tight and hair doesn't get oily. With dandruff, the flakes can be larger, oily and yellowish, and the scalp is usually oily. If there's redness, oily crusts or distinct plaques, it's a good idea to see a dermatologist.

Does putting oil on a dry scalp help?+

On a truly dry scalp without dandruff, a light, short oil treatment before washing can bring comfort. But if the flaking comes from dandruff, it can get worse, because the yeast naturally present on the scalp feeds on oils. If you're not sure, a scalp serum with ceramides or moisturizers is a safer option than oil.

Is a sensitive scalp really a thing?+

Yes. Feeling stinging, burning, itching and tingling without any visible signs is a condition that has been described in research, and it's reported more often by women. These sensations are real and can usually be eased with the right care.

Why does my scalp itch all the time?+

Itching can have many causes: dandruff and seborrheic dermatitis, a dry scalp, irritation or allergy from products, psoriasis, lice and stress are some of them. If the itching has lasted for a few weeks, is keeping you up at night or comes with redness, flaking or sores, seeing a dermatologist is the right move.

Care by age

Am I breaking out because I don't wash my face?+

No. Acne is about hormones, oil glands, clogged pores and inflammation, not dirt. In fact, washing too often and too harshly can make breakouts worse. Gentle cleansing twice a day is enough.

Should I use moisturizer if I have oily skin?+

Yes. When skin lacks moisture, the barrier gets stressed and sometimes produces even more oil. A water-based, non-pore-clogging, lightweight gel cream is ideal for oily skin.

At what age should I start retinol?+

There's no specific age requirement; the mid-20s is a good starting point for many women. If you're prone to breakouts or dark spots, you can start even earlier. Begin with a low strength on 2–3 evenings a week, and always use sunscreen.

Do I need sunscreen on cloudy days?+

Yes. UVA rays pass through clouds and glass, and they're responsible for a large share of aging and dark spots. Applying sunscreen every morning is the most effective habit.

Do I need collagen supplements in my 30s?+

Although some studies on oral collagen peptides show small improvements in hydration and elasticity, the data are limited. Enough protein, vitamin C, sun protection and retinoid use are a stronger foundation.

Can retinol and vitamin C be used together?+

They can, but using vitamin C in the morning and retinol in the evening generally reduces irritation and lets you benefit from both.

How do I know if I'm in perimenopause?+

Changes in the time between periods, hot flashes, night sweats, sleep problems and mood swings are the most common signs. Dryness and sensitivity in the skin may come along with them. Your gynecologist can evaluate you based on your symptoms.

Why did my skin suddenly get so dry?+

As estrogen declines, your skin's ability to hold water and its sebum production can drop. Switching to a richer moisturizer and a cream cleanser, and avoiding hot water, make a difference in this period.

How much collagen is lost during menopause?+

Research shows that skin collagen can drop by up to 30% in the first five years after menopause and then continues to decline by about 1–2% per year. Sun protection, retinoids and good barrier care support your skin through this process.

Why is my body so itchy?+

Declining sebum, rising skin pH and fewer barrier lipids lead to dryness and itching. Short, lukewarm showers, soap-free cleansers and a rich moisturizer after showering usually bring relief. If the itching doesn't go away, see your doctor.

Why does my itching get worse at night?+

At night, the skin loses more water, and with fewer distractions around, itching is felt more. Applying a thick moisturizer before bed and keeping your bedroom cool and humid bring relief. If the itching continues, see your doctor to look for an underlying cause.

Is it worth starting new skincare products at this age?+

Yes. Even in older skin, retinol was shown to increase collagen production, and moisturizers to noticeably reduce dryness. Skin responds to good care at every age.

Can I use retinol during pregnancy?+

No. Oral vitamin A derivatives are linked to birth defects; although the risk of topical retinoids is much lower, they're not recommended during pregnancy. If you're planning a pregnancy, stop using retinoids; you can use azelaic acid, niacinamide and vitamin C instead.

Which sunscreen should I choose during pregnancy?+

Mineral sunscreens with zinc oxide and titanium dioxide are the most commonly recommended options. If you're prone to melasma, a tinted formula with iron oxides adds extra protection against visible light.