Main factors
Causes of Skin RednessRedness, or erythema, occurs when blood vessels dilate, increasing blood flow to the skin's surface. It can result from:
Environmental FactorsSun exposure, extreme weather, and humidity.
Skin ConditionsRosacea, eczema, and psoriasis.
AllergiesReactions to skincare ingredients, foods, or environmental allergens.
Lifestyle ChoicesStress, alcohol, spicy foods, and caffeine.