If the red dots on the body are particularly itchy, if the surface of the red dots is smooth and there is no skin flakes, the possibility of allergic diseases is high. For the treatment of allergic diseases, it is necessary to remove the suspected causative factors, get rid of the allergen, and give symptomatic treatment, you can choose 1-2 antihistamines orally and vitamin C and calcium intravenously as appropriate. The lesions need to be treated with appropriate medication according to the status of the lesions, for example, topical application of glycopyrrolate lotion to relieve itching. If the lesions are widespread, glycopyrrolate may be given in combination with a spot of glycopyrrolate. If the surface of the rash is accompanied by silvery white scales, and after scraping off the scales, a waxy film and punctate bleeding can be seen, the possibility of common psoriasis is high. The treatment is mainly topical glucocorticoid cream and carbotriol treatment, and in severe cases, it can also be combined with oral Avea and narrow-spectrum medium-wave ultraviolet light therapy.