How To Know If I Have A Tooth Cavity. A cavity or caries is just tooth decay that has penetrated the hard outer enamel layer of your tooth. Sensitivity that lingers after eating hot or cold food could be a sign that you have a cavity.
Unlike the usual black stain, these types of stains can appear all over the tooth. The cavity starts at the enamel but can continue on to the dentin, or inner layer of your tooth. Meanwhile, a cavity is a hole that has been made in the tooth by bacteria.
Pain on biting down may indicate an abscess or a cracked tooth due to the decay.
How to tell if you have a cavity. Sugary foods can also irritate the cavity, leading to pain and discomfort. Adults aged 20 to 44 have a 25% cavity rate, which suggests that kids brush their teeth more often than adults. Meanwhile, a cavity is a hole that has been made in the tooth by bacteria.