What should you know about disseminated superficial actinic keratosis?

Actinic keratoses are rough, scaly patches caused by cumulative ultraviolet exposure. They may feel easier to detect than to see and can be pink, red, brown, or close to the surrounding skin tone. Disseminated superficial disease describes many relatively shallow lesions across sun-exposed areas, such as the face, scalp, ears, forearms, or backs of the hands.

A lesion that becomes thicker, tender, persistently crusted, bleeds, or forms an ulcer needs assessment because actinic keratosis can overlap with early squamous cell carcinoma. A skin cancer screening visit can help map lesions and decide whether any require biopsy.

When many lesions occupy one sun-exposed area, a dermatologist may discuss photodynamic therapy, imiquimod treatment, or topical 5-fluorouracil. Individual thicker spots may be treated with cryotherapy or another procedure. Each option can cause temporary redness, scaling, soreness, or crusting, so ask what reaction is expected and how to care for the area.

Use broad-spectrum sun protection, seek shade, wear a hat and protective clothing, and avoid deliberately tanning the affected skin. Check familiar areas regularly, but do not scrape off rough spots or use wart treatments without a diagnosis.

Make a dermatology appointment for new clusters, lesions that do not settle after treatment, or uncertainty about a rough patch. Seek prompt assessment for rapid growth, increasing tenderness, repeated bleeding, a firm thickened centre, an ulcer, or a sore that repeatedly crusts.

Ask whether the lesions need mapping or biopsy, whether field treatment or spot treatment fits your pattern, and how to manage the expected reaction. Ask how often your skin should be checked and which changes should be reported sooner.