Thank you for your query, It seems that you may have a neurgenic bladder. The micturition (urinating) reflex is controlled by several muscles that act together. (some have to contract & others have to relax) When the nerves that supply these muscles are injured/damaged (by surgery, stroke, diabetes, compression by a herniated disc, to name a few), symptoms of urinary incontinence may appear. In your case an underactive bladder is accompanied by symptoms like inability to tell when the bladder is full, urinary retention & complete emptying of bladder. I would investigate the causes for the neurogenic bladder by obtaining detailed medical history, complete physical exam, an ultrasound scan. MRI of the spine, relevant blood work (complete blood count, diabetes panel, lipid profile, renal & liver function tests) & urine routine. Further investigations based on history & results of the above tests. In the meantime, monitor for symptoms of urinary tract infections (burning sensation, pain while urinating or abdominal pain, fever). Please continue to drink enough (not too much) water-about 2-3 liters a day (if there are no medical contraindications to do so like heart/kidney disease). Maintain a diary with the time, quantity of urine & any associated symptoms. Do pelvic muscle strengthening exercises (kegels exercise) to improve voluntary control of muscles. Long standing urine or Increased pressure in the bladder could push the urine into the kidney causing it to dilate and get damaged. Please see a urologist to confirm diagnosis & treat the cause at the earliest. Wish you good health. Please get back to us for further clarification