If there is a cavity in the big tooth, there is no need to worry, you can go to the hospital for repair treatment. When a cavity occurs in a tooth, if it is not particularly deep and does not endanger the pulp tissue, it is only a simple cavity that can be solved by dental filling treatment. If the decay is deep enough to damage the pulp, root canal treatment is needed. After the root canal treatment, it is recommended to make a porcelain tooth to protect the crown in a week or so. When a cavity in a large tooth is prone to pain, you can take anti-inflammatory drugs or painkillers for temporary pain relief. But the best way is to go to the hospital for treatment as soon as possible, the earlier the treatment, the better the later effect.