When your teeth hurt, it generally means there is an underlying issue affecting the tooth or surrounding tissues. Common causes include tooth decay (cavities), which can cause pain especially when the decay extends into the dentin layer beneath the enamel. This pain often occurs with stimulation such as consuming hot, cold, sweet foods, or when brushing. Inflammation of the tooth pulp (pulpitis), caused by advanced decay, trauma, or defective dental work, can cause persistent pain that may linger after stimulus is removed. Infection leading to an abscess (pus collection around the root) can cause severe, constant pain and sensitivity to tapping or chewing. Other causes include trauma to the tooth, gum infections, impacted or erupting wisdom teeth, and even sinus infections that cause referred pain to upper teeth. Tooth sensitivity, malocclusion (improper bite), teeth grinding, and gum disease can also cause tooth pain. If your tooth hurts, it is often a sign that the tooth or gum tissue is damaged or infected, requiring prompt dental evaluation to prevent complications such as spread of infection. Severe symptoms like swelling, fever, or headache alongside tooth pain warrant emergency care. Maintaining good oral hygiene can help prevent many causes of tooth pain.