Medical term for involuntary urination, especially at night. In everyday conversation, おねしょ is more common.
For the treatment of enuresis, lifestyle improvements can be effective in some cases.
小児科で遺尿症と診断された。
He was diagnosed with enuresis at the pediatric clinic.
From 遺尿 (involuntary urination) + 症 (condition/syndrome). A Sino-Japanese medical compound.