Root canal treatment is the so-called treatment to kill the nerve, the care after root canal treatment includes the following aspects: a. After root canal treatment, there may be pain, swelling symptoms, belonging to the reaction after the root filling, is a normal root filling reaction, about 3 days or so, the patient may have a different degree of sensitivity, some people with heavier symptoms, you can take anti-inflammatory drugs orally to reduce the symptoms. Some patients do not have obvious symptoms, just ignore. Second, after root canal treatment the tooth has already been darkened and brittle, do not eat too hard food to prevent splitting. Third, you should follow the doctor’s instructions, regular follow-up, crown restoration, is the tooth can extend the life and ensure the hardness.