The main clinical manifestation of penile pus is the appearance of purulent discharge in the urethra, in addition to this manifestation, there may also be burning, itching, pain in the urethra, and even the appearance of the clinical manifestation of hematuria. Once these clinical manifestations appear, it suggests that there may be the possibility of acute urethritis. Acute urethritis is a sexually transmitted disease, belonging to the category of sexually transmitted diseases, which mainly includes gonococcal urethritis and non-gonococcal urethritis. The causative organisms of non-gonococcal urethritis are mainly mycoplasma and chlamydia, and the clinical manifestations of these two types of urethritis are similar, so it is recommended that you go to the hospital in time to do a secretion smear or secretion culture test, and routine urinalysis to make a clear diagnosis.