What can happen if a tooth is very infected? pain runs down to my neck and up to my right ear. it is my bottom tooth on the right side. it is offandon

Need treatment: You need to see a dentist asap. Today. You have an infection that needs to be treated. An infection that runs down your neck is a very serious infection. It needs to be treated now.

pain: If it is an infected tooth it will get worse and can have more long range effects ( heart, muscles etc ) off and on most likely means it is in earlier stages. Go to the dentist asap.

Problems: An infected tooth only gets worse over time, regarding pain, swelling, and discomfort. The sooner you see a dentist the sooner you will feel better.