I was diagnosed with mitral valve prolapse about 15yrs ago, im not on any meds for it, will a infected tooth cause lightheadedness and pain in my head?

It Can: A dental abscess can certainly contribute to pain in the head and neck region, as well as your feeling lightheaded. With your history of MVP, you should see your dentist ASAP for the proper diagnosis and treatment recommendations for your infected tooth.

It's a long shot: It is quite unlikely that an infected tooth would cause pain and lightheadedness, but if you have a seizure, you should be especially concerned, and immediately ask for medical help. A fever would also be concerning. It would help to get the input of a dentist or cardiologist too, but it is my feeling this is not likely.

Of course: if the tooth is beginning to abscess, it can cause you to get seriously ill. It won't go away without treatment and the infection may spread to your jaw, cheeks, sinus and to other areas of your head and your. body. Visit a dentist ASAP for abscess diagnosis and drainage.