Is it normal to get hernia from partial sigmoid colectomy & pulling pain to my rectum& pain in rt side that goes into back & down my leg?

Yes, get checked: You need to follow up with the surgeon to discuss your symptoms and rule out any complications from the previous surgery or a newly developed problem.

Abdominal pain: When was surgery? For what? After surgery can get adhesions/ scar tissue that cause pain.There can be internal hernias, nerve damage, spasm, constipation,diverticula,vascular compromise . as well as. post op abcess if surgery was recent and some fever. Back/sciatic pain from surgery position if recent. CT with oral/ IV contrast helps, sometimes need laproscopic look. Discuss with doc

Hernia is possible: If there was an open incision, there is about a 15-20% have if getting a hernia, unless the "short stitch" technique was used, then the risk drops to 5-8%. A variety o aches and pains are normal after major abdominal surgery. Best to see your surgeon for an exam to find out. Hope this helps!