From MLB Power Pros Wiki

Description

Toothache is a negative status in Success Mode. It is acquired as a starting stat, or by using items (such as the chocolate sponge cake), or through random events.

It is known as Tooth Decay in Success Mode 2007.

Effect

This condition will reduce the amount of strength points gained during practice as well as in games by half.

Cure

Toothache can be cured by a visit to the hospital, or by Dr Goodjob.