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Whether it is your upper or bottom teeth that hurt, it can be frustrating and anxiety-inducing. If you have developed sudden tooth sensitivity — causing teeth hurt while eating and chewing — it could be due to several reasons.

If you are worried about your bottom teeth hurting or you have been wondering “why do my bottom gums hurt”, then here are a few causes:

Teeth Grinding

You may grind or clench your teeth too much if your bottom teeth aching presents as less severe and more of a continual throbbing or achy discomfort. When focusing or working out at the gym, many people clench their teeth. It is also possible to grind your teeth while sleeping. Grinding or clenching regularly wears down your enamel, exposing the tubes that lead to your nerves. This might cause sudden tooth sensitivity and pain. Consult your dentist about wearing a mouth guard if you believe you clench or grind your teeth.


Cavity pain is typically felt in one or more teeth when you bite down, and it is severe, constant, and sudden. Sudden tooth sensitivity can also be a result of cavities. You may have a cavity if you have not been brushing, flossing, or using mouthwash to remove all of the plaque on and around your bottom teeth. Gum recession can also lead to cavities. Cavities are holes in the teeth caused by acids that eat away at the enamel. Fortunately, filling a cavity is a simple and quick procedure.

Infected Root

You may have an abscessed tooth or a root infection if you have a severe and chronic bottom toothache that causes throbbing or shooting pain. Your gums and glands may be inflamed, and your teeth may be sensitive to severe temperatures and biting down. The most common cause of an infection at the root of your tooth is severe tooth decay. Bacteria infect the centre of your tooth (the pulp) between your gum and your tooth when acids have been permitted to damage your enamel for some time. If you do not see a dentist and get your infection treated, it could spread to the bones that support your lower teeth. A root canal can be used to remove the infection from your teeth. If you believe you have developed an abscess, visit your dentist immediately.

Broken or Fractured Tooth

You may have a fractured tooth if your bottom teeth hurt when chewing or when your tooth is exposed to high temperatures, but the pain occurs irregularly. The pulp, or soft tissue at the centre of your tooth, is where your nerves are found. Your nerves are protected by your enamel and dentin, which is the hard layer beneath your enamel. The closer your pulp comes to being revealed, the more your nerves are irritated, resulting in discomfort and sensitivity.

At times, your teeth and gums may not be the cause of the problem at all if you are experiencing your bottom teeth aching. Problems in other parts of your body may present as toothache. Heart attacks, viral infections, nerve-relates disease, diabetes, cluster headaches, sinus infections, drug and alcohol abuse, and more can be a reason for toothaches. Only your dentist can diagnose you properly. Therefore, if you have a persistent toothache, visit your dentist to get diagnosed and appropriate treatment.

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