2% is the highest strength permitted in over-the-counter acne products and the level most clinical work is built on. ...

Facial skin takes far more cumulative UV than covered skin, and its melanocytes are more reactive. Why the gap forms,...

Low B12 is linked with patchy hyperpigmentation, low iron with pallor and under-eye shadowing, low zinc with slow-hea...

Toothpaste residue, lip balm films, friction and hormones congest the skin between nose and chin. How to clear perior...

Retinol with acids, retinol with benzoyl peroxide and two exfoliants at once are the pairs worth separating. Plus the...

Neck acne comes from hormonal oil production, friction from collars and straps, and hair-product residue in a zone mo...

Sunscreen pills when it cannot bond with the layer underneath - usually a timing, texture or technique problem rather...

Pimples on the scalp come from the same oil, dead skin and bacteria that cause facial acne - made worse by hair oil, ...

Dark knuckles are usually the result of friction, dryness and sun exposure on thicker joint skin - occasionally they ...

Glycolic acid is a water-soluble AHA that works on the skin's surface for dullness and texture. Salicylic acid is an ...

SPF 50 filters about 98% of UVB, so around 2% still gets through — and tanning is UVA-driven too. Why you still tan w...

Heel skin is thick, has no oil glands, and splits under pressure when it dries out. The routine that works — soften, ...