The body out of a lot of small red dots may be the following: 1, fungal infection, fungal infection is prone to local erythema, papules or local red spots, must go to the hospital to do fungal immunofluorescence detection, after the diagnosis of antifungal treatment on; 2, consider allergic dermatitis, allergic dermatitis will cause the whole body erythema, red papules, blisters, this time must go to the hospital to do allergen detection. To see which substances are allergic to the environment, food, in order to avoid in the future life, and reduce the symptoms of the body red spots; 3, may be bleeding spots, allergic purpura, leukemia, myelodysplastic syndrome will appear red spots on the skin, in fact, petechiae, need to immediately go to the hospital hematology department to do bone marrow aspiration, to confirm the situation after further symptomatic treatment.