Hi, my father is 50 yrs old man and he is taking aspirin and other cardiac drugs for chd.now he is having anal fissure which is not healing?

Avoid constipation: Constipation and forced bowel movements are the root cause behind formation of the fissure. It is a tear in the skin inside the rectum that occurs when it stretches too far while passing hard stool.

I don't think : The two conditions are related. Anal fissure comes from tight anal sphincter. Have him go see a colo-rectal surgeon for opinion.