Many small red dots on the back consider the following possibilities: 1. psoriasis, on the basis of small red dots can be seen silvery white scales, scraping away the scales can be seen film phenomenon and punctate bleeding phenomenon. You can apply compound amineptin tablets, combined with compound glycyrrhizin tablets, topical carboplatin ointment, combined with dinaide ointment for treatment. The cause of this disease is not clear, may be related to genetics, immune disorders, smoking, trauma and other factors. 2, folliculitis, small red dots are folliculitis papules, acne, pustules, and accompanied by itching or stinging pain, mainly caused by bacterial infection or follicular sebaceous gland ducts are blocked caused. In the treatment can be oral isotretinoin soft capsule, topical clindamycin phosphate gel, combined with adapalene gel to carry out treatment.