The presence of nerve pain in the cavity often means that the tooth has developed pulpitis. In this case, conservative and invasive treatment options are available. The main option for conservative treatment is to take medications, such as anti-inflammatory and analgesic medications. At the same time to completely relieve pain, you also need to apply anti-inflammatory drugs, mainly broad-spectrum amoxicillin, cephalosporin, with nitroimidazole, such as metronidazole, ornidazole and so on. However, it should be noted that these conservative treatment options are unlikely to cure this pain completely. If the cavity is found to be too large to be filled, a crown restoration can be considered to repair the cavity.