The signs indicating the need for an endodontic treatment can vary but typically include severe toothache, particularly when chewing or applying pressure, prolonged sensitivity to hot or cold temperatures even after the source of heat or cold has been removed, discoloration or darkening of the tooth, and swelling, tenderness or inflammation in the nearby gums. Recurring or persistent pimples on the gums can also be a symptom of a deeper issue that an endodontic treatment may address. These symptoms could be indicative of pulp inflammation, infection, or decay. It's important to consult with a dental professional if you experience any of these symptoms, as early detection can increase the effectiveness of the treatment and the chance of saving the tooth.