Hi,I thought I was getting better, but still struggling with constipation issues. I think it's structural, and not slow transit.I have a history of straining, and anal fissure. For a few months I've had to squat, or at work raise one of my legs to contract the abdomen to have a good BM.Now I have a reduced urge to defecate. Also, I had a couple particularly hard straining episodes - the push-as-hard-as-you can - without realising how bad it was. In hindsight, I probably should have ran out and got glycerin suppository. But I forced out some hard stool.Last week I had a sigmoidoscopy prep and now I have this problem, every night like clockwork I get this rectal tightness, I look down and see my veins, and the area is red. I also get a little bit of anal twitching. In the morning I have REALLY hard stool, compacted, too large to pass.I got some nifedipine ointment to see if relaxing the fissure will help, but I worry there's rectal nerve ofr muscle damage. Does anyone know a treatment that will help? Some sort of massage? Muscle relaxant med? Biofeedback?Ack, this is really ruining my health.