Suddenly itchy arm scratching a red piece of mainly because of hives, solar dermatitis, insect bite reaction, etc., can be used under the guidance of the doctor to apply drugs, oral medication, physical therapy and other methods.
1. Urticaria: Urticaria is usually caused by the patient’s contact with allergic substances, resulting in a perverse reaction of the skin, so the arm suddenly itchy scratching red. It can be treated by applying glycerine lotion and compound dexamethasone cream locally. You can also take cetirizine hydrochloride tablets, loratadine tablets for treatment.
2. Solar dermatitis: solar dermatitis is a skin reaction caused by strong sunlight exposure, the lesions will lead to necrosis of epidermal cells, but also make the blood vessels dilated, so that the patient appeared to have a sudden itchy scratching red arm symptoms. Oral chlorpheniramine maleate tablets, ebastine tablets and other drugs.
3. Insect bite reaction: insect bite reaction is mainly caused by insect bites, the human body may produce local allergic reaction after being bitten by insects, so that the patient has a sudden itchy scratching red arm symptoms. It can be treated by oral chlorpheniramine maleate or ultraviolet light.
When the patient appears arm suddenly itchy scratching a red piece may also be eczema, prickly heat and other reasons, it is recommended to go to the hospital in a timely manner, to clarify the cause of the disease, and then follow the doctor’s instructions to use medication.