The scientific name for strangulated urticaria is skin scratching or artificial urticaria, in which striated, raised patches of skin with varying degrees of itchiness appear under certain pressure stimuli. The cause is currently thought to be related to the release of vasoactive mediators from skin mast cells, which can be treated by the following methods: 1. Removal of the cause: Scratch urticaria is usually related to pressure, such as the local appearance of thread-like red wind masses after the skin has been scratched by nails or other blunt objects, accompanied by the phenomenon of redness and itching around. Therefore, scratching, scratching, pressure stimulation and other triggering factors should be avoided to reduce the chance of occurrence; 2. Drug therapy: Clinical treatment of urticaria is usually not topical drugs, if the disease does not exceed 6 weeks, consider acute urticaria, if there is no chest tightness, wheezing, abdominal pain, diarrhea and other symptoms, it is not necessary to take injection therapy. The condition can be controlled quickly with antihistamines first under the guidance of a doctor, and then oral medications to reduce vascular permeability can be administered orally as prescribed by a combination of antihistamines such as loratadine tablets, cetirizine tablets, levocetirizine tablets, ebastine tablets, and appropriate amounts of vitamin C, vitamin P, and calcium. It helps to reduce exudation and local edema, control pruritus symptoms, and relieve and treat urticaria. If the rash subsides after taking the medication, the dosage can be reduced or the interval between doses can be increased, and it is not recommended to stop taking the medication completely; 3. Injection therapy: If the disease lasts more than 6 weeks, it is considered chronic urticaria and can be injected with BCG polysaccharide nucleic acid injection and thymopentin injection to improve immunity, and in addition, oral antihistamine medication needs to be combined for treatment. Such patients should pay attention to rest, light diet, quit smoking and drinking, avoid eating cold, greasy, spicy and irritating foods, such as chili peppers, onions, cold drinks, or fishy hair foods such as fish, shrimp, crab, etc., which contain high protein. At the same time, it is necessary to maintain emotional stability, avoid excessive depression, anxiety, avoid local scratching or hot compresses, massage, etc., to prevent the spread of the disease.