Red bumps on the skin after scratching may be urticaria, which can be treated causally and symptomatically, and symptomatic treatment is based on medication. 1. Causative treatment: the occurrence of urticaria is usually related to drugs (penicillin, sulfonamide), food (seafood, eggs), inhalants (pollen, dander), infections (bacterial, viral), physical factors (light, heat) and so on, and it is necessary to clarify the causative factors and avoid them first. 2. Drug therapy: the treatment of this disease can use antihistamines, such as cetirizine, levocetirizine, loratadine; you can use vitamin C to reduce the permeability of blood vessels, often used in conjunction with antihistamines, to enhance the effect of antihistamines, reduce angioedema, for patients with severe urticaria; you can also use glucocorticosteroids, aminoglycosides or salicylsulphonylpyridine, which can provide rapid relief of lesions and itching symptoms. The disease can be applied externally with glycerite lotion and anti-itch solution, usually used in summer, which can quickly stop itching and eliminate skin lesions; it can also be applied externally with benadryl cream, usually used in winter, which can quickly relieve itching and skin damage. It is recommended that patients with red bumps on the skin after scratching should consult a doctor in time to clarify the cause of the disease, strictly follow the doctor’s instructions for treatment, and should not use drugs indiscriminately during the treatment period.