hello and welcome to HCM forum,
I will be glad to answer your query,
I would like you to know that symptoms like stiffness
in neck and irregular bowel movements are not at all related to tooth extraction.
Sometimes, If antibiotics are prescribed following extraction, they have temporary side effects like diarrhea
I will advise you to see your physician first followed by the dentist
I hope this answer was useful,
I wish you good health,