Frequent urination is not necessarily a sign of pregnancy. Frequent urination cannot be the main symptom of pregnancy, and it is usually caused by the gradual enlargement of the uterus after pregnancy that presses on the bladder and other surrounding tissues. Frequent urination may be related to urinary tract infection, urethritis, urinary stones and other diseases, patients are advised to go to the hospital for timely examination. Frequent urination is usually caused when the uterus gradually expands after pregnancy and presses on the bladder and other surrounding tissues. It is not the main feature of pregnancy, which is characterized by cessation of menstruation. Frequent urination may be related to the following causes 1. Urinary tract infection:When bacteria, fungi, mycoplasma and other infections of the urinary tract, it will trigger a urinary tract infection, which is mainly manifested as frequent urination, urinary urgency, painful urination, lower abdominal pain and other uncomfortable symptoms. 2. Urethritis: mainly refers to the urethral infection caused by various pathogens. Patients mainly manifested as urethral itching, painful urination, urethral opening redness and swelling, urethral secretion increase and other symptoms. 3. Urethral calculi:The presence of stones in the urinary tract can cause pain, hematuria, urinary frequency, urinary urgency, urinary difficulties and other symptoms. It is recommended that patients go to the hospital in a timely manner to clarify the cause of the disease and treat the cause of the disease.