Root canal therapy is a treatment used to save a tooth when the inner pulp becomes infected or inflamed. This can happen because of deep decay, cracks, trauma, or repeated dental procedures on the same tooth. Symptoms may include severe tooth pain, sensitivity to hot or cold, swelling, or discomfort when chewing. During root canal therapy, the infected or damaged tissue inside the tooth is removed, the inner area is carefully cleaned and sealed, and the tooth is restored for normal function. This treatment helps relieve pain while allowing patients to keep their natural tooth instead of having it extracted. Root canal therapy also prevents infection from spreading to surrounding tissues. With proper restoration and ongoing dental care, a treated tooth can continue to function comfortably for many years.