Male urethral pus without odor can be caused by common urethritis, gonococcal urethritis and non-gonococcal urethritis and other diseases. 1. common urethritis: urethritis caused by common bacteria, frequent urination, urinary urgency, painful urination, hematuria and urethral pus and other manifestations, need to consult a doctor in time for anti-infective treatment, and drink more water to enhance the amount of urination, which will help flush out the bacteria in the urinary tract and metabolites. 2. Gonococcal urethritis: After being infected with Neisseria gonorrhoeae by factors such as unclean sex, urethral pus may appear, accompanied by symptoms such as urinary urgency, frequent urination and painful urination. 3. Non-gonococcal urethritis: when infected with chlamydia, mycoplasma or other atypical bacterial infections, urethral pus can also occur, accompanied by itching in the urethra and urinary discomfort and other symptoms. Men who have pus in the urethra should consult a doctor in a timely manner, under the guidance of a specialist to actively carry out the appropriate treatment, which will help to alleviate the discomfort symptoms as soon as possible.