When is excimer laser therapy recommended for scalp psoriasis?

Scalp psoriasis can produce thickened, inflamed, scaly plaques that are difficult to reach with creams or lotions, especially through dense hair. Excimer therapy delivers a focused beam of ultraviolet light to affected skin while limiting exposure to nearby areas. A dermatologist checks whether the diagnosis is clear, how much scalp is involved, whether plaques are active or infected, and whether another treatment would be more practical. It is usually part of an individual treatment plan, not a substitute for ongoing scalp care.

Bring a list of scalp products and medicines, and mention light sensitivity, a history of unusual reactions, recent tanning, or treatments that suppress immunity. Follow instructions about washing and separating hair so the clinician can reach the plaques. Do not scratch or forcibly lift scales. Use prescribed products as directed and protect treated skin from unnecessary ultraviolet exposure.

Contact the clinician for blistering, severe burning, spreading redness, pus, or pain that does not settle. Seek assessment for sudden hair loss, bleeding plaques, eye symptoms, or a rapidly changing scalp rash, since these features may need diagnosis or treatment beyond light therapy.

Ask whether your plaques are suitable for focused light, how hair will be managed during sessions, which scalp medicines continue, and what reaction requires a prompt review.