It is recommended to go to the hospital for examination to further clarify that most of them are caused by infections. The causes of infections: 1, may be due to inattention to personal hygiene and lead to abnormal multiplication and increase of bacteria latent in the foreskin, glans, etc., and cause infection, which can then form pustules with local pain, redness or exudation and other changes, which may be caused by bacterial infection or fungal infection. 2, may also be due to unclean sexual contact and lead to gonococcus, mycoplasma, chlamydia and other infections, the infection can appear local pain, accompanied by purulent urethral discharge or the formation of glans, foreskin pustules, etc., and may be accompanied by local erosion or local skin ulceration and other reactions. 3, medical diseases such as long-term use of immunosuppressive drugs or patients with diabetes, the formation of abscesses with local pain, redness or oozing, etc., and the need for further relevant bacteriological examination to further determine. The patient who has been taking immunosuppressants for a long time or has diabetes is prone to infection of the glans and foreskin, and the infection forms a local abscess and an abscess.