How is there a red dot on the glans penis?

Disease analysis: 1, caused by balanitis prepuce. It is characterized by erythema on the glans penis, and there are usually small pustules or papules on the surface. It will also show local edema of glans mucosa, slight desquamation at the edge, papules and pustules spreading around to form glans erosion. 2. Non-infectious factors are mostly because the foreskin is too long and not clean enough. Dirty things between the foreskin and glans, that is, scales, will accumulate and stimulate local foreskin and mucosal inflammation. 3, genital herpes: and there may be a small red envelope on the glans, there will be itching symptoms. Consciously burning and itching, occasionally fatigue, discomfort and slight fever and other systemic symptoms, healing can leave temporary pigmentation.