7-year-old children always wet the bed may be physiological reasons, enuresis, enuresis and other factors. 1. Physiological reasons: at night before going to bed, if the child drinks a lot of water or eats too much fruit, it will be easy to lead to an increase in the production of urine, 7-year-old children always wet the bed. 2. Enuresis: When a 7-year-old child suffers from enuresis, he or she will be prone to wetting the bed all the time, which may be caused by genetic factors, abnormal development of bladder and urethra functions, and so on. 3. Uremia: If a 7-year-old child has uremia, such as central uremia, renal uremia, etc., it is easy to always wet the bed, and there will also be a phenomenon of polydipsia, polyuria. The 7-year-old child always wet the bed after excluding physiological causes, parents should take the child to the hospital in time, clear cause of the active treatment, so as not to delay the condition.