There is no harm in open pulp drainage. Open pulp drainage is mainly a treatment method for teeth whose inflammation has spread to the apical part of the root, with a lot of secretions and exudates. But the current view is generally not advocate the previous open 24 hours, usually let the patient wait in the waiting area, open for a while after rinsing and then put medicine, it is not harmful, only to reduce the patient’s pain symptoms. Once the pulp is opened and drained, the patient’s pain will be immediately relieved, unless the patient has developed an inflammatory cellulite infection, at which point the patient may be given fluids and a combination of antibiotics.