There are many causes of red dots on the body. First of all, if the patient has sudden appearance of red dots all over the body with intense itching, allergic dermatitis and eczema must be excluded. If allergic dermatitis or eczema occurs, the first step is to remove the allergen and related triggering factors. At the same time, you should control your diet, adhere to a light diet, avoid contact with tobacco, alcohol, and irritating foods such as onion, ginger and garlic, and avoid scratching and massaging the area. You can also take oral anti-allergy medication, such as antihistamines, and apply corticosteroid ointment locally. If red spots are found on the body, the presence of hemangioma must also be ruled out, especially for capillary hemangioma occurring on the face and other places, which can be irradiated with a 585 or 595 nm laser. If the capillary hemangioma is more extensive, surgical excision may also be used in combination.