Red spots all over the body indicate that there may be some problems in the body, and the more common ones are allergy, punctate psoriasis and follicular keratosis, etc. We need to consider them according to the specific situation: 1. Allergy: allergic reactions occur due to contact with pollen, animal hair or drugs that stimulate the organism, such as eczema, etc., which will manifest as red spots on the surface of the skin and may be accompanied by itching, which is relatively common. Patients need to carry out anti-allergy treatment, and at the same time find allergens to avoid re-occurrence; 2. Pitting psoriasis: patients have genetic susceptibility, the onset of red spots can involve the whole body, and the surface of the red spots will be covered with silvery white scales. Treatment includes topical or oral antibiotic drugs, which can be combined with the use of herbal medicines to clear heat and cool blood; 3. Follicular keratosis: it is a chronic, lifelong disease, and in addition to genetic factors, changes in hormone levels and sun damage may be related to the onset. Initially, red dots will appear on the skin surface, densely packed, after which the volume will slowly become larger and gray or black in color, like a crust. At present, there is no particularly satisfactory clinical treatment method, mostly using moisturizers to apply to the skin to soften the keratin, and heavier cases can be treated with oral vitamin A acid drugs under the guidance of doctors; 4. capillary hemangioma: benign vascular tumor, common in infancy, can fade with hand pressure, and most of them will fade on their own with age, no treatment is needed. If the disease does not subside as the patient grows older, it can be treated with glucocorticoids, etc. In addition to the above, liver function abnormalities may also appear red dots all over the body, when the body is found to be abnormal attention should not scratch, should be timely medical treatment, so as not to aggravate the disease.