A five-year-old child wetting the bed at night may be a normal phenomenon caused by drinking too much water before going to bed, or it may be caused by enuresis, or it may be caused by occult spina bifida, the causes are different, and the treatment methods are different. 1. Physiological factors: If a five-year-old child just happens to wet the bed once in a while, it may be caused by drinking too much water before going to bed at night or eating too much watermelon and other water-rich foods, which is a normal phenomenon, avoid letting the child drink water and eat watermelon before going to bed, no need to worry about it too much. 2. Enuresis: Enuresis can also lead to symptoms of bedwetting at night in a five-year-old child. Because enuresis is related to genetic factors, psychological factors, and delayed physiological development, it should be treated by helping the child to reduce the psychological burden and help the child to establish a regular routine and urination habits. 3. Occult spina bifida: occult spina bifida is a kind of occult vertebral canal closure insufficiency disease, the disease can also lead to five-year-old children to appear the symptoms of bedwetting at night, the treatment can be through the surgical way of treatment of occult spina bifida, can be in the night time to wake up the child to urinate. After eliminating physiological factors, if the symptoms of nighttime bedwetting persist in a five-year-old child, it is recommended to consult a doctor in time to identify the cause and ask the doctor to deal with it.