I think we must have all had one, toothache to end all tooth ache. Pain direct from hell. An abscess is very very painful. You must seek the attention of a dentist as an abscess under the tooth is a collection of pus. Left untreated it can cause all sort of problems. When you have seen the dentist they will usually have given you antibiotics to reduce the inflammation before work can be done. This does not always help the toothache.
For relief from the pain and associated symptoms of an abscess. There are a few things you can do.