Facial Redness: Causes and When to Consult a Dermatologist?

Facial redness is not a single disease. Transient flushing, rosacea, seborrheic dermatitis, irritant or allergic contact dermatitis, atopic dermatitis, sun damage, cosmetic irritation, and rarer inflammatory or systemic diseases can all cause facial redness.

In the assessment, it is important to know when the redness started, how long it lasted, which areas it was in, whether it was accompanied by burning or itching, and what situations worsened it. Not every red face has rosacea.

Rosacea most often affects the central part of the face; it may be accompanied by flushing, persistent erythema, visible veins, papules and pustules, and eye complaints. The current approach suggests evaluating rosacea based on the phenotypic characteristics of the patient rather than classifying it into fixed subtypes.

Seborrheic dermatitis is characterized by oily or fine scaling around the nose, between the eyebrows, and along the hairline; contact dermatitis by itching and burning after exposure to a new product or contact; and atopic dermatitis by dry, sensitive skin and itching. Rarer conditions such as lupus erythematosus and dermatomyositis are considered in the differential diagnosis when rashes are accompanied by atypical, persistent, or systemic symptoms.

Flushing can be triggered by heat, exercise, hot drinks, alcohol, spices, stress, and sudden temperature changes. Not all flushing is rosacea. If there is significant itching, contact dermatitis or eczema should be considered further.

Telangiectasia is the term used for the prominence of superficial blood vessels. It can occur in rosacea, chronic sun damage, and some connective tissue diseases. Treatment varies depending on the cause of the redness. In rosacea, gentle skin care, sun protection, topical/oral treatments, and in selected patients, targeted laser or intense pulsed light (IPL) may be used. In contact dermatitis, identifying and removing the trigger is essential.

In most patients, the diagnosis is made based on history and dermatological examination. Depending on clinical suspicion, patch testing, dermoscopy, laboratory investigations, or rarely biopsy may be necessary. Sudden facial swelling, shortness of breath, swelling of the tongue and lips, or rash accompanied by generalized urticaria require urgent evaluation.