Unclean urine may be caused by diseases such as urethritis, cystitis, etc. Male patients also need to consider that it is caused by prostatitis. In addition, the lack of clean urine may also be the result of other diseases such as urinary tract stones. 1. Urethritis: Urethritis is caused by gonococcal and non-gonococcal pathogens. Patients will have frequent urination, painful urination, urinary urgency and other symptoms. As a result, patients have the manifestation of unclean urine. 2. Cystitis: Cystitis is caused by bacteria, kidney stones and other diseases, and the main symptoms of patients are urinary urgency, painful urination, frequent urination, burning sensation in the urethra and so on. As a result, the patient will not be able to urinate cleanly. 3. Prostatitis: Prostatitis is caused by bacterial, viral and other pathogenic infections, patients will have urinary urgency, frequent urination, burning pain in the urethra, urethral dribbling and other symptoms. As a result, patients will have the manifestation of unclean urine. 4. Other: other diseases such as urinary stones, prostate hyperplasia, bladder cancer, etc. can also lead to the phenomenon of unclean urine. When the patient has the symptom of unclean urine, he should consult the doctor in time to find out the cause of the disease and follow the doctor’s instruction.