The desire to urinate while lying down is mostly caused by diseases of the organs around the bladder, bladder diseases and physiological factors. 1. Diseases of the organs around the bladder, when there are ovarian cysts, uterine fibroids, uterine mucosal ectopic, pelvic tumors, pelvic inflammation and other diseases, the desire to urinate occurs due to stimulation when lying down. 2. Bladder diseases, when there is cystitis, bladder tumor, stones, foreign bodies and other diseases, change the position will be stimulated by the desire to urinate. 3. Physiological factors, if you drink too much water before going to bed, so that the bladder is in a full state, lying down will also have a strong desire to urinate. It is recommended to consult a regular hospital in a timely manner under the guidance of a professional physician to rule out diagnosis and targeted treatment.