A lot of red rashes on the arm itching, mostly contact dermatitis, papular urticaria, eczema and other diseases, should be treated with glucocorticoids, antihistamines.
1. Contact dermatitis: If a small amount of exudate appears in the acute stage, zinc oxide oil can be used. When there is no exudate, glycerite lotion can be used for external application. During the subacute period, glucocorticoid drugs such as mometasone furoate cream and halometasone cream can be applied to improve the symptoms and combine the treatment.
2. Papular urticaria: For mild rashes, medications such as glycerite lotion can be used to relieve itching. Oral antihistamines, such as cetirizine and loratadine, can also be used to shorten the duration of the disease. For local soft tissue infections, antibiotics such as mupirocin can be used for topical treatment.
3. Eczema: is caused by a variety of internal and external factors of the superficial dermis and epidermal inflammation, this disease to antihistamine-based drug therapy, commonly used, including imipramine, cetirizine, etc.; secondary infections, can be combined with antibiotics such as erythromycin treatment. If there is exudation, cold wet compresses such as 3% boric acid solution can be used, and glucocorticoid cream can be used after the exudation is reduced.
All of the above medications should be used under the guidance of a doctor to avoid self-medication. A lot of red rashes on the arm itchy, there may be other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.