Have you ever had a toothache? Whether the pain was dull or intense, anyone who has ever experienced tooth pain can speak to how unpleasant it is. One of the most common causes of a toothache is a tooth infection. Though having a tooth infection means bad news for your smile, can it impact your overall health? Read on to learn about the ways that an infected tooth can affect your health, whether it can be fatal, and some tips for preventing an infection from forming in the first place.