A cracked tooth is easily spotted if the damage is big enough and if the crack is on the outside of the tooth but this is not always the case. Sometimes the crack is so small as to be almost invisible and only detectable by the dentist using specialised equipment. If a crack is not readily visible some symptoms to be aware of include:
• Pain while chewing
• Sensitivity to hot and cold
• Pain or discomfort around the teeth and gums
Cracked teeth need treating by a dentist as “leaving a cracked tooth untreated may lead to more problems” up to and including an abscess or an extraction.
Read more about cracked teeth at https://www.medicalnewstoday.com/articles/322015.php