<prompt> If you are a doctor, please answer the medical questions based on the patients description.My 16 year old son has been prescribed ferrous fumerate 210mg tablets 3 times a day , after getting blood tests back and being told he has an under active thyroid TSH level 4.12 serum free T4 12.4. This was yesterday 28912 We were told to go back for more blood tests in 2 months. Whilst at the doctors , we pointed out a painful swelling and soreness below his front teeth into his chin. She prescribed Daktarin 2 oral gel. It has not helped. The pain has got worse , swelling more pronounced. The doctors out of hours say its dental and the dentist cant see him for 24 hours. Being a weekend. He has no fillings or cavities. His last visit to the dentist 2 months ago was all clear. He has good dental higine. Is it doctor or dental and could it be an abcess or conected to the thyroid problem ? Thankyou.  <response>: Thanks for your query, I have gone through your question, the swelling in the chin or below the teeth area could be a periapical abscess or periodontal abscess leading to cellulitis you need to take a radiograph like IOP AR in relation to those teeth till you meet your dentist take a course of antibiotic like penicillin if he is not allergic...dont apply pressure on that area.do saline gargling 3-4times...its not related to thyroid problem... 