What it is, why it happens, and what actually treats it — every entry written in plain English and backed by primary research.
What acne actually is, what causes it, what makes it worse, and which treatments are worth your time - written by a board-certified dermatologist.
What acne scars actually are, how they differ from flat brown and red marks, and which treatments genuinely help - by a board-certified dermatologist.
What an actinic keratosis is, why this precancer is treated, what freezing and prescription creams involve, and when a patch needs a biopsy.
What alopecia areata is, why hair falls out in patches, whether it grows back, and how it is treated - by a board-certified dermatologist.
What athlete’s foot looks like, why it keeps coming back, and how to actually clear it - written by a board-certified dermatologist.
What basal cell carcinoma looks like, why a sore that will not heal matters, and how it is treated - written by a board-certified dermatologist.
What cellulitis is, the warning signs that need same-day or emergency care, and how it is treated and prevented - from a board-certified dermatologist.
What causes cold sores, what sets them off, and which treatments actually shorten an episode - written by a board-certified dermatologist.
How to tell irritant from allergic contact dermatitis, how to find the cause, and what actually clears it - written by a board-certified dermatologist.
What causes dandruff, why it is not a dry scalp, which medicated shampoos work, and how to stop it coming back - from a board-certified dermatologist.
Why under-eye circles happen, how to tell pigment from shadow, and which treatments help each type - written by a board-certified dermatologist.
What causes dry skin, what makes it worse, and the routine that actually fixes it - written by a board-certified dermatologist.
What atopic dermatitis is, why skin flares, what makes it worse, and which treatments are worth your time - written by a board-certified dermatologist.
What an epidermoid cyst is, why it flares, and why draining one is not the same as removing it - written by a board-certified dermatologist.
Why women’s hair thins at the part, how it is diagnosed, and which treatments actually hold on to hair - written by a board-certified dermatologist.
What folliculitis is, how to tell it from acne, what brings it on, and which treatment matches which cause - from a board-certified dermatologist.
Fungal acne is Malassezia folliculitis, not acne. How to tell them apart, why acne treatment fails, and what clears it - from a dermatologist.
How to tell if it is really head lice, why one treatment is rarely enough, and what to skip - written by a board-certified dermatologist.
What hidradenitis suppurativa is, why it is not a hygiene problem, and which treatments prevent tunnels and scars - by a board-certified dermatologist.
What hives are, why the cause is so often never found, and how daily antihistamines control them - written by a board-certified dermatologist.
What causes excessive sweating, how the treatment ladder works, and what to try first - written by a board-certified dermatologist.
What impetigo looks like, how it spreads, how long it stays contagious, and which treatments clear it - from a board-certified dermatologist.
Why ingrown hairs and razor bumps happen, how to shave so they stop, and what clears the marks - written by a board-certified dermatologist.
What jock itch is, why it usually starts on your feet, and how to clear it without making it worse - written by a board-certified dermatologist.
What a keloid is, why it keeps growing, who is most at risk, and which treatments actually help - written by a board-certified dermatologist.
What keratosis pilaris is, why scrubbing makes it worse, and which creams actually smooth it - written by a board-certified dermatologist.
What male pattern hair loss is, why it happens, which treatments hold the line, and why starting early matters - by a board-certified dermatologist.
What melanoma looks like, the ABCDE warning signs, who is at risk, and when to get a changing spot checked - from a board-certified dermatologist.
What melasma is, why light, heat and hormones set it off, and which treatments actually help - written by a board-certified dermatologist.
What milia actually are, why squeezing them never works, and how they are properly removed - written by a board-certified dermatologist.
What a normal mole looks like, the ABCDE changes worth acting on, and when to get one checked - written by a board-certified dermatologist.
What molluscum contagiosum is, how it spreads, how long it lasts, and when treatment is worth it - written by a board-certified dermatologist.
What nail fungus looks like, why treatment takes months, which options actually work, and when to get the nail tested - by a board-certified dermatologist.
How to tell nail psoriasis from nail fungus, what causes pitting and lifting, and what treatment can realistically do - by a board-certified dermatologist.
The rash around the mouth that steroid creams make worse - what triggers perioral dermatitis, how it is treated, and how long it takes to clear.
What plantar warts are, how to tell one from a callus, why they hurt, and which treatments actually work - written by a board-certified dermatologist.
Why dark marks form after spots and rashes, how long they take to fade, and what actually speeds them up - written by a board-certified dermatologist.
Why flat red marks are left behind after spots, how they differ from scars and dark marks, and how long they take to fade.
What psoriasis is, what sets off flares, and how creams, light treatment and biologics compare - written by a board-certified dermatologist.
What ringworm is, how it spreads, why steroid creams make it worse, and how to treat it so it does not come back - from a board-certified dermatologist.
What rosacea is, what triggers it, and which treatments work for flushing, redness, bumps and eye symptoms - written by a board-certified dermatologist.
What scabies is, how it spreads, why the itch lasts weeks after treatment, and why the whole household is treated - from a board-certified dermatologist.
What scalp psoriasis looks like, how it differs from dandruff, and the treatments that actually reach the skin - written by a board-certified dermatologist.
Why seborrheic dermatitis and dandruff happen, what makes them worse, and the routine that keeps them quiet - written by a board-certified dermatologist.
What a seborrheic keratosis is, how it differs from melanoma, when to get a growth checked, and how removal works - from a board-certified dermatologist.
What shingles is, why the rash follows one nerve, why the first 72 hours matter, and how to lower your risk - from a board-certified dermatologist.
What skin tags are, why they form, when one needs checking, and why home removal kits are a bad idea - from a board-certified dermatologist.
What squamous cell carcinoma looks like, who is at risk, how it is diagnosed and removed, and when a spot needs checking - by a dermatologist.
Why stretch marks form, how they change over time, and what treatment can and cannot do - written by a board-certified dermatologist.
Why a sunburn shows up hours later, what actually eases it, how long peeling takes, and the signs that mean you should be seen by a doctor.
What sun spots are, how to tell them from freckles and from something serious, and what removes them - written by a board-certified dermatologist.
Why telogen effluvium causes sudden heavy shedding, the two to three month delay, and how long recovery takes - by a board-certified dermatologist.
Why tinea versicolor leaves pale or dark patches, how it is treated, and why the color takes months to even out - written by a board-certified dermatologist.
What vitiligo is, why the skin loses pigment, which treatments bring color back, and how long it takes - written by a board-certified dermatologist.
What warts actually are, how they spread, what makes them worse, and which treatments are worth your time - written by a board-certified dermatologist.
What causes wrinkles, which treatments have real evidence behind them, and which do not - written by a board-certified dermatologist.