Hi Dear, Welcome to HealthCareMagic. I have gone through your query & can understanding your concern. toothache can be due to many reasons. Most common is periapical abscess . This occur when infection spreads from dental caries to beneath root of the tooth You should consult a dentist or endodontist specialist. Treatment depends on the condition of tooth, carious lesion, extent of infection and bone support of the tooth as follow :- - If the infection is moderate and root of the tooth is also get involved , root canal treatment or apicoectomy will be performed. - If there is bone loss and infection is severe the extraction of tooth should be done along with prescription of antibiotics. In meanwhile you can take Augmentin Antibiotic twice day & Do warm saline rinses several times a day and take ibuprofen (if not allergic ) or acetaminophen for pain and swelling. Hope your concern has been resolved. Good luck