If you have a blockage in your colon it can be a medical emergency especially if the colon is completely blocked and it may require surgery to clear your blocked colon.
Signs and Symptoms that your Colon is blocked are severe belly pain or cramping, vomiting, not being able to pass stool or gas etc.
If your colon or intestine is blocked then you need to seek medical attention because it's a serious problem and needs prompt medical attention.