If the body is itchy, a scratch on the red spots, it is likely to be caused by allergies, this situation is mostly considered to be in contact with allergy-causing substances or eat allergy-causing food caused by, must pay attention to avoid excessive scratching, you can consider the use of anti-allergy medication, such as oral loratadine and other antihistamines, or also can be applied topically cyproheptadine cream, if the itching symptom is serious, can also be used to apply glycerin lotion or hormone cream. If the itching symptoms are severe, you can also apply glycerin lotion or hormone cream. Itchy body, a scratch on the red spots, may also be caused by eczema, the pathogenesis of this situation is more complex, there is no effective method of eradication, and it is difficult to find the cause of allergies, you can consider using some symptomatic treatment, such as the use of antihistamines for treatment, or the use of glucocorticosteroid drugs for treatment.