Children always wet the bed, may be related to physiological factors, may also be due to enuresis or genitourinary inflammation and other causes. 1. Physiological factors: commonly found in younger children, due to the immature development of bladder contraction function, urinary self-control ability is not well developed, there may be the phenomenon of bedwetting. Along with the child’s gradual growth and development, the phenomenon of bedwetting can gradually disappear. 2. Enuresis: If the child suffers from enuresis, the phenomenon of constant bedwetting will occur. Consider that it may be related to genetic factors, mental factors, disease factors, bladder dysfunction and other factors. 3. Inflammation of the genitourinary system: if the boy, if there is a problem with the prepuce, failed to regularly wash the genitals, is likely to lead to inflammation of the urethral opening, in the stimulating effect of inflammatory factors, resulting in increased sensitivity of the urethra, thus causing the phenomenon of always wetting the bed. If the girl, due to the failure to pay attention to the vulva hygiene, easy to induce vulvovaginitis, may also appear bedwetting phenomenon. Children always wet the bed, exclude physiological factors, should promptly consult a doctor, a clear diagnosis of the cause, give targeted treatment.