Hello, The problem list you have mentioned here shows all signs of Oral Submucus Fibrosis. It is a serious concern. First of all you should stop having any type of tobacco/supari/lime stone ect. They are the primary causative substances. And report to the dentist as soon as possible. Few exercises, medications, injections and even surgical treatment can be done.

Yes..medicinal treatment advisable. Exercise would be beneficial  for better result