Anal pain&stool leakage,did a colonoscopy& everything seemed normal.i think i have sphincter spasm which causes constipation which worsens spasm??

Increase Fiber: This sounds terrible for you. Chronic constipation can result in anal pain and spasm. Ideally, increasing your fiber by eating a lot of vegetobles -- I recommend a pound per day -- will soothe your constipation and provide your daily dose of fiber. With a normal colonoscopy, often we have to circle back to lifestyle modification to help. Also try 4 prunes a day. Very effective for constipation.