There are many reasons for the urinary urgency of small children, such as drinking a lot of water, psycho-spiritual factors, urinary tract infections and so on. 1. Drinking a lot of water: small children drink a lot of water or eat too much fruit containing more water, coupled with the imperfect development of its own urinary center, so it will cause the phenomenon of urinary urgency of small children. 2. Psycho-spiritual factors: due to mental tension, shock, emotional factors, etc., may also lead to the phenomenon of urinary urgency of small children. 3. Urinary system infection: may not pay attention to personal hygiene, bacteria and other pathogenic bacteria from the urethra invasion, resulting in cystitis, urethritis and other urinary system infections, can also cause urinary urgency and frequent urination and other symptoms. Small children may have other reasons for urinary urgency, the need for timely medical observation, diagnosis of the condition, and standardized treatment under the guidance of clinicians to avoid delays in the condition.