How do I know if my teeth are rotted?

Go to a dentist. Bad breath, bleeding gums, pain, teeth breaking or falling out are all signs of poor dentition. Best to see a dentist if you are concerned about you teeth.
See your dentist! Your dentist can discover cavities during your regular dental check-up. The tooth surface feels soft when probed by your dentist with a dental instrument. X-rays can also show cavities between teeth before they become visible to the eye. In advanced stages of tooth decay, you might experience a toothache, especially after consuming sweet, hot, or cold foods or drinks.