Small red bumps on the arm after itching and scratching may be caused by urticaria, contact dermatitis, eczema and other factors, which need to be treated according to the specific cause of the disease, usually including general treatment and drug treatment.
1. Urticaria: The occurrence of urticaria is related to the allergic reaction caused by food, drug and contact allergy, which may lead to itchy skin and small red bumps after scratching. You can take oral loratadine, levocetirizine hydrochloride and other drugs, which have the effect of anti-allergy and anti-itch. At the same time, we should actively search for allergens and avoid them.
2. Contact dermatitis: usually caused by contact with allergic antigens, resulting in skin allergic reactions. It is recommended to find and get rid of the allergens to avoid aggravation of symptoms. Oral ebastine, loratadine, levocetirizine hydrochloride, topical glycerite lotion, zinc oxide cream for treatment.
3. Eczema: The exact cause of eczema is not yet completely clear, such as ultraviolet light, pollen and other external stimuli, may induce eczema, resulting in skin pimples, itching. The preferred treatment drugs are glucocorticoids, such as topical mometasone furoate cream, hydrocortisone butyrate ointment and other drugs.
Red bumps appear after scratching the arm, it is recommended to avoid scratching stimulation, to prevent induced bacterial infection. It is recommended to go to the dermatology department of the hospital in time to find the cause and cooperate with the doctor for treatment. The above medications should be used in accordance with medical advice.