Tooth sensitivity, along with tooth decay, usually happens when the outer protective layer of the teeth (enamel) gets damaged. This may occur because of cavities, poor brushing habits, too many sugary or acidic foods and drinks, smoking, or gum problems. Once the enamel becomes weak, the inner sensitive part of the tooth becomes exposed, which can cause sharp pain or discomfort when eating hot, cold, or sweet foods. You should visit a dentist for a thorough examination, as tooth decay does not heal on its own and may worsen over time. If left untreated, it can lead to severe pain, infection, or even tooth loss. Depending on the condition of the tooth, treatment may include cleaning, dental fillings, fluoride treatment, or sometimes a root canal procedure. Until then, gently brush twice a day with a soft toothbrush and use a toothpaste meant for sensitive teeth. Try to avoid very hot, cold, or sugary items, and rinse your mouth after meals. If you notice swelling, bleeding gums, bad breath, or ongoing pain, do not delay getting dental care. Early treatment can help prevent further damage and save your teeth.