Scratch urticaria is generally not very serious, it is only one of the more common types of urticaria, belongs to an allergic inflammatory reaction of the skin vessels, need to be judged according to the symptoms. Scratch urticaria is divided into simple scratch urticaria and symptomatic scratch urticaria: 1, simple scratch urticaria: mostly seen in women, belongs to the physiological body abnormal reaction, clinical manifestations of skin scratched by nails or other blunt objects will appear rash block, mostly no itching or discomfort, the general symptoms are relatively mild; 2, symptomatic scratch urticaria: common in young people with allergies. Patients often feel itchy skin for unknown reasons, not the common urticaria rash blocks that appear all over the body, but when the skin is scratched with nails or other blunt objects, local erythematous clusters first appear, followed by edema higher than the skin, and in the edges of the erythematous clusters appear the phenomenon of redness, similar to the shape of the whip after the whip. In severe cases, there is even swelling of the lips and mouth after the teeth have bitten them, which is more serious. When suffering from scratchy urticaria, it is recommended to use anti-allergic drugs to relieve itching, such as oral cetirizine hydrochloride tablets, chlorpheniramine maleate tablets, etc., or topical application of glycopyrrolate lotion, glucocorticoid ointment. You should avoid excessive scratching and choose a light diet, such as fresh vegetables and fruits rich in vitamins, including red grapes, tomatoes and carrots, or take vitamin C.