Bedwetting in an eight-year-old child may be related to physiological reasons such as drinking more water and being too excited before bedtime, as well as pathological reasons such as urinary tract infections and developmental delays. 1. Physiological reasons. When a child drinks too much water before bedtime, it may cause increased urination and bedwetting may occur if the child sleeps too well; if the child is over-excited before bedtime due to playing, etc., and is unable to wake up even though he/she has the urge to urinate after slumbering, it may also lead to the occurrence of bedwetting. If it occurs only once in a while, there is no need to worry about it. 2. Pathological causes. When the child suffers from cystitis, urethritis and other urinary tract infections, there may be frequent urination symptoms, in the sleep, there may be bedwetting phenomenon; if the child’s cerebral cortex development is delayed, as well as genetic factors, etc., can’t inhibit the spinal cord urinary center, the forced urethra muscle after sleep uninhibited contraction of the urine out of the body. In addition, diabetes, uremia, anxiety, education and training and other factors can also cause bedwetting in eight-year-old children. When the child has no obvious cause to wet the bed or accompanied by frequent urination, painful urination and other abnormal symptoms, you need to consult a doctor in a timely manner, under the guidance of the doctor to clarify the cause.