The big tooth is a molar, there is a hole in the molar and the tooth pain may be caused by deep caries, which needs filling treatment, or it may be caused by pulpitis, which needs root canal treatment, as follows.
1. Deep caries: Because the hole is close to the pulp, when food is inserted into the hole or cold water is inserted into the hole, it will cause tooth pain, and the treatment is to use composite resin to fill the hole after removing the decayed dentin.
2. Pulpitis: When the inflammation invades the pulp, the affected tooth may have spontaneous pain, and the pain is aggravated by hot and cold stimulation. Root canal treatment is required to remove the diseased pulp tissue, thoroughly remove microorganisms and toxins in the root canal system with medication, and use root filling material to tightly fill the root canal, and then use inlays or full crowns to repair the shape of the tooth.
There may be other reasons for a hole in the molar and tooth pain, so it is recommended to visit the hospital for early treatment.