What is the reason for the red spots on the arms?

Long red dots on the arm, there may be the following reasons: First, capillary nevus, may be skin aging, may also be related to sun exposure, generally do not affect, no conscious discomfort, do not need special treatment, but pay attention to observation; Second, folliculitis, and bacterial infection has a relationship, you can apply antibiotic ointment; Third, if accompanied by itching, there may be papular urticaria, or began to show eczema, to do anti-allergic treatment, can be applied calamine lotion, oral antihistamine drugs, generally speaking, less red spots, no obvious conscious discomfort, do not need treatment, mainly to observe, if a short time to show more, but also accompanied by other symptoms, it is recommended to immediately go to the hospital dermatology department to see a doctor.