Talk to Gastroenterologist on Anal Problem

i am a quadriplegic from last 5 years. Bowel movement have become problematic due to regular use of enema and manual evacuation. The problem iam looking a solution for is that enema and gas gets stuck and hinders bowel movement and so it takes 2 to 3 hours for 1 bowel movement. anal canal feels tight and painful. i use duphalac syrup.