<s>[INST] I believe I will need a dentist to answer my question. Is there one available? My son lost two of his bottom teeth over month ago. Yesterday he came to show me his mouth. One of the spaces has bubbled and become dark blue however he is in no pain or discomfort. There is no sign on his perminent tooth . What could this be and how concerned should I be? [/INST] Hi and welcome to Chat Doctor, After reading your history I suspect the lost teeth were primary or milk teeth, you did not mention your sons age so that we can predict the eruption of permanent teeth. I would suggest you to consult a dentist and get an x-ray done for the affected area. x-ray will show if there is a remnant of tooth left in the jaw that has lead to swelling and bluish discoloration or there is some infection or bubbling of the area is due to permanent tooth erupting. Accordingly treatment can be carried out. I hope this helps you, take care. </s>