What happens next?

How to tell your boyfriend he needs to see a dentist
Determine what is bothering you.
There may be one or several things wrong with your boyfriend's teeth or mouth. Noticing these symptoms can help you learn about the potential causes and consequences of the problem.

Options:
(A). If your boyfriend forgets to brush his teeth after meals, he might be dealing with something other than brushing his teeth. If your boyfriend wears a constant habit of pulling, tweezing, or straightening his teeth, he might have a dental issue that is causing him a lot of trouble.
(B). It may be more so if the toothache is an early symptom. Noticing the symptoms before your boyfriend notices them may help you understand his tooth problem more clearly and avoid potentially embarrassing situations and arguments.
(C). If you know what's bothering him and can help him come up with solutions to the problem, do so. Make a list of all the reasons he should see a dentist.
(D). This can help you convince your boyfriend to see a dentist. Some common problems include : Bad breath black or rotting teeth dark receding gums yellow teeth Listen to your boyfriend's complaints.
(D).