What you need to take for pain in the posterior groove tooth attached to half of the face is anti-inflammatory and analgesic medication. In general, toothache causing face pain means that the toothache has reached a more serious level, and in most cases, it is caused by an infection, when you want to control the infection, you should first take anti-inflammatory drugs. Generally for tooth pain, it is difficult to extract the corresponding pathogenic bacteria, the general application of empirical application of antibiotics, the routine application of broad-spectrum antibiotics, such as cephalexin amoxicillin, along with nitroimidazole antibiotics, such as metronidazole tinidazole, ornidazole and so on. The application of antibiotics is the most basic program to control this type of toothache leading to infection. In addition to this, some analgesic drugs can be taken for pain, such as ibuprofen, aspirin and so on. The most important thing is that, in addition to the medication, it is also necessary to go to a professional stomatologist to perform pulp drainage or incision and drainage treatment for the tooth or for the swelling, so that the pus can be better drained after formation, and only through the medication with local drainage can the treatment of this disease achieve very good results.