1. Urethritis is one of the common causes of female friends' frequent urination, urgency and pain. This nonspecific urethritis infection is mainly caused by Escherichia coli. The main symptoms of acute urethritis are frequent urination and urgency, accompanied by swelling, tenderness and purulent secretion of urethral orifice. Through routine urine examination, obvious bacteriuria and pyuria can be detected. If you want to make a definite diagnosis of this disease, you can make a definite diagnosis according to the signs, symptoms and purulent secretions. 2. Cystitis is also a reason why female friends repeatedly urinate frequently, urgently and painfully. This abnormal symptom usually occurs after sexual life. This abnormal urinary tract irritation is very obvious, and the general symptoms produced by patients are generally mild. If inflammation occurs in the triangular area of bladder in female cystitis patients, there will be symptoms such as hematuria, low back discomfort and pubic discomfort. 3. In addition, gonococcal urethritis is also a reason why female friends have frequent urination, urgency and pain. Gonococcal urethritis is a sexually transmitted disease, which will affect the whole urogenital system of patients in severe cases.