What does pityriasis rosea look like under dermoscopy?
Apr 06, 2023
Source: Cainiu Health
Dr. Liu Wan
Introduction
Pityriasis rosea, as observed under dermatoscopy, shows unevenly and sparsely distributed dotted blood vessels. Pityriasis rosea is a common skin condition typically presenting with red, pink, or light red patches or papules on the skin, covered with fine scales or bran-like flakes. Its appearance resembles rose petals and grains of wheat, hence the name "pityriasis rosea."
Rosacea dermatitis appears under dermoscopy as unevenly and sparsely distributed dotted vessels.
Rosacea dermatitis is a common skin condition typically presenting with red, pink, or light red patches or papules on the skin, covered with fine scales or bran-like debris. The lesions resemble rose petals and grains of wheat, hence the name "rosacea dermatitis."
Under dermoscopy, the vascular structure is less prominent compared to psoriasis, appearing as unevenly and sparsely distributed dotted vessels. Characteristic free-floating peripheral scales are also visible. Dermoscopic findings include a yellowish background, oval-shaped lesions surrounded by white scales, and absence of明显 dilated blood vessels. This skin condition commonly affects areas such as the face, neck, chest, and back, often accompanied by mild itching.
Treatment for rosacea dermatitis includes topical medications. Under medical guidance, topical agents such as squalane cream, allantoin ointment, or tretinoin cream may be used to help alleviate symptoms and promote skin recovery. In more severe cases, oral antihistamines, antibiotics, or vitamin A supplements may be prescribed by a physician to relieve symptoms and support skin healing.
In daily life, maintaining healthy habits—such as avoiding excessive sun exposure, keeping the skin clean, and refraining from using irritating cosmetics—can help prevent and alleviate rosacea dermatitis.
