Frequent urination in children is related to physiological factors such as drinking a lot of water and mental overstress, and is also considered to be related to urethritis, cystitis, and enuresis. 1. Physiological factors: when children drink a lot of water, mental overstress or anxiety, cold stimulation, frequent urination can occur. 2. Urethritis: the disease is related to pathogen infection, such as gonococcus, chlamydia trachomatis, mycoplasma and so on. When the child suffers from urethritis, there can be urethral itching, frequent urination, painful urination, increased urethral discharge and other symptoms. 3. cystitis: cystitis is related to bacterial infection, medication, foreign body stimulation, etc. Typical symptoms of the disease include frequent urination, urinary urgency, dysuria, burning sensation in the urethra, pain in the lower abdomen and so on. 4. Ureaplasia: Ureaplasia is mainly associated with different degrees of argininopressin deficiency, renal insensitivity to argininopressin, etc. It can also cause some children to urinate frequently. Some children are also prone to irritability, extreme thirst, drinking a lot of water and so on. Frequent urination in children is also related to circumcision, diabetes mellitus, primary aldosteronism, etc. It is recommended to consult a doctor for timely examination and early treatment.