My son of age 29 years can not store urine more than 200ml since last 12 years . But no burning, no pain.Sometimes less than 200ml urine but still severe urge of urine and some drop of leakage of urine. Whenever urge is coming it is so intense he needs to run to toilet to pass urine. He can not delay just 10 seconds. He is treated by a classical homoeopath for last 1 years who prescribe only single medicine according to patient's constitution and miasom. His prescribed medicines are - causticum , medorrinum , cantharis, Argentum nitricum, thuja, Natrum Mur one by one within 1 year. But still no change. Is it possible to increase bladder capacity. Once USG is done 5 years ago which shows bladder normal.