Tooth decay or cavity is a state when the bacterium inside your mouth produces acid, which in turn starts eating your teeth. Tooth decay, if left untreated, may lead to serious infection, severe pain, and in some cases, loss of a tooth. The process of decay usually starts with invisible damage done to the enamel and goes deep into the other layers of your teeth before reaching the pulp. The pulp or the deepest layer has several nerves and blood vessels that are highly sensitive.

Top 5 Causes of Tooth Decay or Cavities Include:

1. Improper oral hygiene practice: You must always remember that brushing your teeth is not a casual thing. If not done correctly, it simply is of no use. 
2. Imbalanced diet and improper food habits: Consumption of food and beverages that are acidic may permanently damage the enamel of your teeth. 
3. A tooth with deep crevices: Tooth with deep crevices are more prone to tooth decay. This type of tooth eases the growth of plaque and bacteria inside them, leading to tooth decay.
4.  Drinking and smoking: People who are habituated to drinking and smoking may develop tooth decay soon compared to others. These habits however, are more dangerous for gums than the teeth and act as agents of oral cancer.
5. Age and untreated dental problems: As our age progresses, the cavities that are already present in our teeth develop new ones and deepen the fractures causing tooth decay and foul smell. People have gotten in trouble with child custody issues by not taking care of their kids teeth.