Frequent urination and urinary weakness always feel the urge to urinate is considered to be caused by urinary system infection, urinary system stones, urinary system tumors and other diseases. 1. urinary system infection: urinary system infection, usually due to pathogenic microorganisms caused by the urinary tract infectious diseases, after the disease will appear back pain, fever, and urinary pain and other symptoms, but also affect the urination, which may cause urinary frequency urinary weakness always feel the urge to urinate. 2. urinary stones: urinary stones are metabolic abnormalities triggered by the body, may also be caused by urinary tract obstruction, usually manifested as lower abdominal discomfort, pain in urination, etc., with the stone’s increase may block the urethral orifice, triggering frequent urination, urinary weakness, always feel the urge to urinate. 3. Urological tumors: including bladder cancer, prostate cancer, etc. Due to organic lesions in the urinary system, there may be blockage or narrowing of the bladder and urethra, which may cause frequent urination and weak urination. If men may also be prostatitis and prostate hyperplasia and other diseases, if women may be uterine fibroids, pelvic inflammatory disease triggered by the need for timely consultation, clear causes after treatment.