Children always pee a little in the pants may be due to physiological reasons, but also may be the symptoms of disease such as penile, urinary tract infection. 1. Physiological reasons: children are in the period of physical development, the bladder and other organs have not yet matured, the capacity of the bladder is small and can not hold more urine, as well as can not freely control the holding of urine, so the child will always appear in the pants on the symptoms of urine. 2. Pathologic causes: (1) the symptoms of the child appear in the pants a little bit of urine is often caused by the circumcision, the child’s foreskin will lead to part of the urine will be left on the foreskin, resulting in part of the urine will be stained on the pants. (2) Urinary tract infections can irritate the child’s urethra, which can lead to symptoms such as frequent urination, urgency to urinate, and a small amount of urine on the pants. (3) If an ectopic opening of the ureter is present, symptoms such as dribbling and leakage of urine may be present, often leading to a wet perineal area. To summarize, when a child experiences discomfort, he or she should go to the hospital immediately.