My teeth ache when i eat sweet foods?

Cavities: Call a local dentist for an appointment for an evaluation.

I agree: Cavities would be the most obvious cause... It would be good to see a dentist.

Sensitivity to sweet: Can be caused by cavities, broken fillings, leaky margins on fillings, cervical erosions, abrasions and abfractions, occlusal erosions. It's best to see your dentist in order to determine specifically what's going on in your mouth. Also, these issues are better taken of sooner rather than later as things tend to get worse over time.