I had a root canal and a crown. The tooth is an anchor for a bridge. The root canal tooth is abscessed.

You definitely need to get the abscess taken care of, as it will only cause you increased pain and infection. If you cannot afford a new bridge, your dentist may be able to remove the abscess from the root tip (called an apicoectomy). Ask your Dr. about this method, as it may save your bridge.

This question is tricky to answer without x-rays and pictures. It is never healthy to have an abscessed tooth in your mouth. the abscess is dumping infection into your body. I suggest visiting your dentist and explaining your financial situation. You may be able to come up with a healthy alternative that is financially acceptable for your budget.