Can cavities cause u to have headaches?

i think i have a couple of cavities my dentist says there not cavities but i have been having really bad head aches lately.

Ya know..... An infection.... like a sinus infection can be a differntial diagnosis for a toothache like headache. But, because your dentist has checked you out you could safely rule the cavity thing out.

A sinus headache can really mimic a tootache tye infection that is manifested into a headache.

Absolutely. And they can lead to a lot more. If a cavity leads to an abcess, it can cause serious illness and bone loss. If your dentist says they're not cavities, however, you may have another problem. If you're a teenager, your third molars may be coming in which can cause headaches.

no just no

It does for me.