Answer:
Yes- cavities do affect your health. The bacteria released from the rotten teeth or cavities leak throughout the blood stream. For many people it may never result in any pain or discomfort but for many others they have a weakened heart- to the point where one could have 10% usage of their heart or a poisoned stomach lining. All due to the bacteria leaked into the body from the cavities.
Cavities are linked to heart disease, digestive problems and / or dementia.
The immune system breaks down and makes the chances of getting sick greater.