Toothache (toothache) refers to the tooth pain caused by various reasons, and is one of the common symptoms in oral diseases, which can be seen in tooth decay, pulpitis, periapical inflammation and dentin allergy, etc. The etiology and treatment of toothache are mainly as follows: 1, tooth decay: the initial caries is generally asymptomatic, such as when the cavity becomes large and deep, the toothache may appear when eating, and the pain increases when eating sweets or too cold or too hot food. At this time, you can use anti-acid toothpaste and warm water to brush your teeth, if necessary, use folk remedies to relieve pain, but the effective treatment method should be to fill the cavity. 2.Pulpitis: It is mostly caused by the infection of pulp due to deep caries, or the stimulation of chemicals or temperature, and the pain is spontaneous, paroxysmal pain, cold and hot stimulation pain and percussion pain. The method of root treatment is to use anvil to grind open the pulp cavity for pulp treatment under local anesthesia. 3, periapical inflammation: Most of the pulpitis spreads to the root canal, causing inflammation of the periapical tissue. It is characterized by persistent toothache. The affected tooth has an elongated feeling, palpation and pressure pain is obvious, and cannot bite food. Go to the hospital for treatment, control anti-inflammation and then root canal treatment. 4. Tooth trauma such as accidental fall, bruising or biting into grit when eating causes tooth fracture or tooth fracture, resulting in toothache. Anti-inflammatory and painkilling drugs can be taken first. Those who are in a position to do so should go to the stomatology department in time. 5, wisdom tooth pericoronitis: wisdom tooth eruption difficulties (obstruction), coupled with poor oral hygiene, causing inflammation, swelling and pain around the crown tissue. The mouth can be rinsed with mouth rinse such as Koutai or Koushu, take anti-inflammatory and pain-relieving drugs, and then extract the blocked teeth after the inflammation. In addition, influenza, trigeminal neuralgia, jaw bone cyst or tumor, hypertension and heart disease can sometimes cause toothache. Therefore, for those who complain of toothache but do not have any lesions, they should not blindly abuse painkillers and should go to the hospital for specialist treatment in time.