how to say...

[heidita]

Yes, Andy, that's it. It would be clear in the context, I suppose.

[Snowcake]

If you want to use Present Perfect here, you may try this:

My teeth have been aching all day. (progressive to emphasis the duration)

or

She has had toothaches since she got up.

Otherwise I'd prefer past simple to present perfect.

His teeth started to ache ...

(to emphasis the beginning and not the process of having toothache)

However, I don't know what native speakers tend to say and which suggestion feels more natural.

Regards,
Snowcake