Untreated cavities can cause pain and infections that can cause problems with eating, talking, playing and learning. Untreated cavities can cause an abscess (a serious infection) under the gums, which can spread to other parts of the body and have serious and, rarely, fatal consequences. Cavities won't go away on their own. If you leave a cavity untreated, it will only continue to grow and cause more decay in the tooth.
The acids in plaque damage the enamel that covers the teeth. It also creates holes in the tooth called cavities. Cavities usually don't hurt unless they grow too big and affect nerves or cause a tooth fracture. An untreated cavity can cause an infection in the tooth called a tooth abscess.
Untreated tooth decay also destroys the inside of the tooth (pulp). This requires more extensive treatment or, possibly, tooth extraction. When you have an untreated dental cavity, you may experience pain. However, once they increase in size, they can affect the nerves in the tooth or cause a fracture.
The infected tooth will be more prone to sensitivity because it is exposed. Therefore, you're likely to experience extreme, ongoing pain if you don't treat cavities right away. Tooth decay is a common dental problem that can usually be resolved with a simple dental procedure, such as a filling.