<s>[INST] I had tooth 19 extracted, 1st molar left side. Periodontist performed the procedure. Buccal side of gum had small abcess due to cracked root. No evidence of any peridontal disease. I am 61 and pre medicated with Clindamycin since I have a complete joint replacement LK.  Swelling of facial area parrallel to site of extraction, about golf ball size. Peridontist Rx Z-Pack which I am taking. i am afebrile but noticed about 1 inch submandibular swelling today on lect side of face. Should I add back in the Clindamycin? [/INST] Hi. Welcome to Chat Doctor . I have gone through your query and can understand your concerns. As per your complaint swelling in the area parallel to the area of extraction and also submandibular region can be due to persisting infection at the site of extraction. In case if the extraction was surgical in nature then injury to the soft tissues during surgical procedure can lead to inflammation and swelling. I would however suggest you to consult your treating surgeon and get evaluated and a thorough clinical evaluation and if needed x-ray can help in diagnosis and treatment can be planned accordingly. As of now take anti-inflammatory painkiller like Motrin or Alive for reducing swelling and pain. Do cool compresses over the swelling as well as swollen lymph nodes. Hope this information helps. Thanks and regards. Chat Doctor.  </s>