If the filling in the back slot tooth is still vaguely painful for two weeks, it usually needs to be treated according to the specific cause. Considering that it is caused by too high filling, irritation of the filling material, inflammation and infection, the tooth can be refilled or root canal treatment can be carried out. 1. Excessive filling: If the filling in the tooth is too high when the patient has a filling, it may cause the patient to have pain when biting, which may lead to hidden pain. It can be adjusted and ground in the hospital for treatment. 2. Stimulation of filling materials: If the degree of dental caries is serious, resin and other materials will stimulate the dentin, which may stimulate the pulp and cause hidden pain or hot and cold stimulation pain. Re-treatment can be done after predicting the pulp condition. If it is just more sensitive, consider observing it again. If the pain is not relieved or the condition is found to be serious after examination, it is considered that the caries has extended to the pulp and root canal treatment is needed to eliminate the inflammation and stop the pain. If you still have pain after two weeks of having a filling in the back of your tooth, you should consult a doctor and get appropriate treatment according to the situation.