What causes warm water to hurt teeth?

If the patient shows pain when drinking warm water, it may be caused by pulpitis, especially acute pulpitis. In fact, when acute pulpitis occurs, drinking warm water causes pain, and if you drink too cold or too hot water, the pain may be more serious. To manage the pain response, an endodontic procedure or root canal therapy is needed to clean the infected pulp, prepare the root canal, irrigate the root canal, disinfect the root canal, and finally fill the root canal.