If you have a lot of small red dots on your body that are not painful or itchy, and if they are accompanied by fever, consider the possibility of a viral rash caused by a viral infection. The treatment of viral rash is mainly to give symptomatic treatment, avoid high fever, it is best to go to a regular hospital and follow medical advice on medication, the rash can usually subside on its own, without excessive treatment. If there is no fever, a painless rash and sexual activity, it is advisable to exclude syphilis, which is a sexually transmitted disease, and the second stage syphilis rash is copper-red, flesh-red or rose-red, with no conscious symptoms. If the performance of the trunk as well as the proximal extremities of the rose-red poke-shaped papules, rash, accompanied by circle collar-like desquamation, consider may be pityriasis rosea, need to choose the regular hospital consultation, clear diagnosis, give treatment.