Possible causes of hydronephrosis: 1. Urinary tract infection, especially acute purulent urethritis, is mostly infected by Staphylococcus aureus. After infection, frequent micturition and urgency may occur, accompanied by purulent secretion of urethra, and dysuria is more obvious when micturiting. It is suggested to take purulent secretion for bacterial culture, and the cultured Staphylococcus aureus can be diagnosed.

2, gonorrhea, caused by gonococcal infection, spread through unclean sexual intercourse. After infection, frequent urination and urgency may occur, accompanied by yellow purulent secretion of urethra. At this time, it is necessary to take yellow purulent secretion for smear examination.

3. Non-gonococcal urethritis, infected by mycoplasma and chlamydia, is mostly transmitted through unclean sexual intercourse. After infection, white or yellow thin purulent secretion may appear, accompanied by pruritus and discomfort of urethra. At this time, it is necessary to take secretions for the culture of mycoplasma and chlamydia. If the culture results are positive, a diagnosis can be made.

Don't worry, don't be afraid to determine the cause, prescribe the right medicine, keep a good attitude, and you will recover soon.