What can be done to empty bowels completely in a constipated person?

Hello doctor,

I cannot empty my bowel at once in the morning after the bowel movement in the morning. I get an urge again after an hour or so or after eating something. How do I empty my bowels completely? I took psyllium husk, it causes a lot of gas so I have stopped taking it and mucous discharge happens with most of the bowel movements. It feels like rectum has not been emptied completely, and whenever I masturbate I get an urge to defecate and nothing but clear mucus comes out and in the next bowel movement too.

Thank you doctor,

Actually, the mucous passage causes irritation and I feel it can automatically come out from anal opening at any time. That is why I am a bit cautious about mucus, sometimes it just blocks the passage and I have to manually clear the way for stool by inserting my finger which is a very disgusting thing. And sometimes if I do not insert a finger into the area near the anal opening, very small pieces of stool just stick there and become hard and does not allow next bowel movement to occur normally. I am willing to take any measure. It is just that I want this to end. Please help.