k bahut saare reasons hain. Like intraoral due to poor oral hygiene, gum infection
or deposit on the tongue. Or can be due to extraoral reasons like nose, throat or gastric problems. So get a complete
examination done for proper treatment. Scaling k baad sensitivity ho skti hai. Depends on the amount of infection present in the gums. Use any sensitivity toothpaste for that. If it still persist ask your dentist
to apply desensitizing agent.