Red patches on the forehead may be caused by solar dermatitis, allergic purpura, erythema multiforme and other diseases, which can be treated by applying medicines and adjusting living habits for improvement.
1. Solar dermatitis: due to prolonged ultraviolet irradiation, erythema, papules, flushing with itching and other symptoms will appear on the exposed parts of the body. Mild symptoms do not require special treatment, do a good job of sun protection. If accompanied by severe itching, you can take oral loratadine as prescribed by the doctor, and use boric acid ointment to relieve the symptoms.
2. Allergic purpura: a kind of allergic inflammation, often caused by autoimmune system dysfunction, often manifested in the formation of purplish-red petechiae on the surface of the skin, which will not fade when pressed, and accompanied by joint pain and abdominal pain and other symptoms. After clear diagnosis, patients can take oral prednisone, cyclosporine and other drugs as prescribed by doctors.
3. Erythema multiforme: related to immunity, infection, drugs, etc., often manifested as recurrent edematous erythema, papules, blisters on the erythema in severe cases, and it will involve the whole body and other parts of mucous membranes. Patients can take oral prednisone, cetirizine, topical glycerite lotion and other drugs. Patients should keep the skin clean and avoid irritation.
Anterior chest red plaque, can also be seen in other diseases, it is recommended to consult a dermatologist for timely examination. Clear diagnosis, symptomatic treatment, the above drugs should be used in accordance with medical advice.