My adult son has a tooth that needs extracted. His insurance requires preauthorization (!?), so he saw a dentist and the request was submitted. In the meantime, he was prescribed 10 days of amoxicillin, which he did not take properly. It's been 2 weeks since his visit and his jaw and cheek and swollen and painful. He went to the ER, at his dentists suggestion, and was given ibuprofen and 500mg pencillin 4 x day, which we are monitoring, to be sure it gets taken. Today is day 2, and he is still in pretty severe pain and the swelling seems to have subsided a bit, but not noticeably. I am very concerned for his health. When should we see improvement?? Can the dentist extract the tooth with the infection?