Male urethral bleeding may be caused by urethritis, cystitis, urethral stones and other diseases. 1. Urethritis: usually due to gonococcus, chlamydia trachomatis, mycoplasma and other pathogens infection. General male gonococcal urethritis patients often appear in the early stage of the disease, urinary urgency, urinary pain, urinary frequency and other symptoms, and will be accompanied by urethral urethral redness and swelling of the situation. Non-gonococcal urethritis patients can also be manifested as urethral itching, increased urethral secretions, some patients will only be found in the urethra of blood crust or crotch dirt. 2. cystitis: clinical common is caused by bacterial infection, and non-bacterial cystitis may be due to radiation therapy, drugs, chemicals, foreign bodies and so on, but also with the obstruction of urine flow, long-term catheter catheterization and other factors. Patients often appear urinary frequency, urinary urgency, urinary pain and other symptoms, some patients may also appear lower abdominal pain, accompanied by hematuria or pus urine. 3. Urethral calculi: the formation mechanism is not clear, most of the upper urethral calculi in the urethra retention triggered, and also with dietary habits, genetics, gender, environment and other factors. Patients will have difficulty in urination, pain in urination, dribbling urination and other symptoms, accompanied by hematuria and urinary tract infections. It is recommended that male patients with symptoms of urethral bleeding, timely cooperation with the doctor to find out the cause of the disease, and active treatment.