The scenario you are describing is compatible with chronic fecal retention
. You need to ask his doctor to get him admitted to a hospital and to get his bowels completely evacuated with age appropriate doses and methods of enema
. Once his bowel has emptied, you can start him on behavioural modification program so that he does not retain stools inside of him. The symptoms are periodic because he reaches a full abdomen once every fortnight.
- Dr. Taher