Beauty

Retinoid dermatitis can mean expected irritation, not allergy. Learn warning signs, ways to ease dryness and peeling, and when to pause or seek medical advice.

Learn how to protect your scalp, cover part lines, reapply sunscreen, and recognize skin cancer on scalp signs that need a clinician’s review.

Learn how to patch test skincare with a small-area repeat-use check, what a clear result cannot rule out, and when to ask a dermatologist about allergy testing.

Shaving bumps can look and feel like thicker regrowth, but shaving does not change hair. Learn why stubble feels coarse and how to shave with less irritation.

Coconut oil for hair growth is often promoted online, but pre-wash use has better evidence for reducing hair-shaft protein loss than stimulating new growth.

Learn how fragrance free skincare differs from unscented, spot fragrance ingredients on labels, and compare disclosure rules in the US, UK, EU and Australia.

A gel manicure UV lamp emits mainly UVA. Learn what research says about cancer risk and ways to reduce exposure with sunscreen or UV-protective gloves.

Waxing after accutane can lift or injure fragile skin. Learn how topical retinoids differ from isotretinoin, what wait guidance says, and options to discuss.

Learn how to use azelaic acid for rosacea, which symptoms it may improve, how to limit irritation, when results may appear, and how strengths vary by country.

Learn how to use dandruff shampoo, compare ketoconazole, selenium sulfide and zinc pyrithione, and spot signs that need a clinician’s assessment.