Perioral dermatitis and red light therapy: what to know

Perioral dermatitis involves inflamed skin with small bumps, redness, dryness or burning around the mouth, nose or eyes. Red light devices are marketed for several skin concerns, but a visible change in redness would not confirm the diagnosis or address every trigger. Heat, device contact, eye exposure, product ingredients and an unsuitable wavelength may aggravate sensitive skin. A dermatologist can compare the rash with acne, eczema, infection and [Pimples](/symptoms/pimples/) before recommending any device.

Pause irritating skincare and use a gentle fragrance-free cleanser while arranging advice. Tell the clinician about home devices, photosensitising medicines, pregnancy and any eye condition. Do not use a light mask over broken, infected or rapidly worsening skin, and follow the manufacturer’s eye-protection instructions. If treatment is needed, a clinician may prefer a targeted medicine such as [Topical Antibiotic Therapy](/treatments/medical-dermatology/topical-antibiotic-therapy/) rather than relying on light alone.

Seek review when the rash is persistent, painful, spreading or affecting the eyelids. Get prompt care for eye pain or vision change, facial swelling, fever, pus, severe tenderness or a rapidly spreading reaction after device use.

Is the diagnosis definite, and could this be another light-sensitive rash? Could red light irritate my skin or interact with my medicines? What treatment should come first, and how will we judge whether the device is helping?