The arm is particularly itchy with small bumps after sun exposure is mostly considered to be solar dermatitis, which can be treated by general treatment, topical medication, oral medication and other treatment modalities.
1. General treatment: after being exposed to sunlight, the skin itching, goosebumps symptoms, must be transferred to the shade or indoor, to avoid continued exposure to sunlight, to protect the skin; you can use cold towels, ice, etc., cold compresses to reduce the local redness, swelling, itching and other symptoms; mild sunburn, you can use moisturizing cream coated; local blisters, use gauze bandage.
2. Topical medications: obvious itching, topical antipruritic agent treatment, such as glycerine lotion, zinc oxide lotion, etc.; can also be used to inhibit inflammation of glucocorticoids, such as hydrocortisone cream, dianabed cream, etc.; there is a significant exudate, can be used locally in the treatment of boric acid solution wet compresses.
3. Oral medication: if the itching symptoms are more serious, there are systemic symptoms, you can take oral antihistamine treatment, such as cetirizine, epinastine, etc.; serious condition, you can also take oral glucocorticoid treatment, such as dexamethasone, prednisone, etc..
It is recommended that after a clear diagnosis, the patient should be treated with reasonable medication under the guidance of the doctor, and not blindly self-medication.