What should you know about reactive erythema?

Erythema means visible redness caused by increased blood flow near the skin surface. A warm room, exercise, emotional stress, rubbing, heat, sun exposure, a new product, or a cosmetic procedure can trigger a flare. The colour may fade when the trigger stops, although sensitive skin can remain flushed for longer.

Reactive erythema is a description, not one single diagnosis. Redness may also occur with rosacea, contact dermatitis, heat rash, psoriasis, sunburn, or cellulitis. The pattern, warmth, tenderness, itch, scale, swelling, and speed of spread help a clinician decide what is happening.

Remove any new cosmetic or skincare product and rinse gently with lukewarm water. Use a bland moisturiser, avoid scrubbing, and protect exposed skin from sun, heat, and friction. A cool damp cloth may feel soothing; avoid applying ice directly to the skin.

Take a photo during a flare and note what happened beforehand, including exercise, food, heat, a product, or a procedure. Do not use steroid creams, antibiotics, or strong anti-redness products without medical advice. A dermatologist can decide whether treatment for [Skin Redness](/symptoms/skin-redness/) or a trigger-specific condition is appropriate.

Arrange medical review when redness lasts beyond the trigger, returns often, or comes with burning, scale, itch, or visible blood vessels. Seek same-day care for rapidly spreading redness, marked warmth, swelling, pus, fever, or severe tenderness, as these features can occur with cellulitis. Get emergency help for redness with breathing difficulty, faintness, or swelling of the lips or tongue.

What features make this reactive erythema rather than rosacea or contact dermatitis? Which products should I stop, and what cleanser or moisturiser is suitable? Should I avoid heat, sun, or a planned procedure? If redness persists, could an option such as [IPL Photofacial](/treatments/laser-and-energy/ipl-photofacial/) be appropriate after the cause is clear?