See a MD. Blocked bowel generally means obstruction and requires immediate medical attention.
Depends on the Cause. Small bowel obstructions are usually due to adhesions from prior surgery, hernias, or tumors. Adhesional obstructions may often get better with bowel rest, but the others usually require surgery. Large bowel obstructions are due to many different causes including colorectal cancers, conditions such as diverticulitis and inflammatory bowel disease, or volvulus (twisting). Rx depends on the cause.
Seek Help! See a physician (md or do) immediately. This is a very serious condition.