Hi.. Can understand your concern.. As per your query the pain in your lower jaw may be due to either an infected tooth or infected gums.. If it is an infected tooth you can see your dentist and an IOPAR( x ray ) can give you and your dentist a clear picture of the tooth decay and what treatment should be carried out.. Other thing is that when your scaling was done may be due to deeper scaling there might be laceration to the gums or any calculus or food debris may get deeply impacted into the gums accidently leading to pain.. The exact cause of pain can be found out by clinical examination and x ray.. I would suggest you not to take any pain killer if the pain is not severe as if the pain subsides it becomes difficult for a dentist to quickly rule out the exact cause of pain.. Hope your query is solved.. Thanks and regards.. Dr.Honey Nandwani Arora.