Hi dear , Salivary gland stones ( salivary calculi ) can become lodged in the duct leading from the salivary gland, blocking the flow of saliva into the mouth. This can cause swelling and pain in the gland. Usually, a procedure is needed to have the stone removed, although it can sometimes come out of the mouth on its own, or after a bit of probing . Sucking on lemon candy is also a good option many times this method remove the stone . Doctor can remove it by doing minor surgery if lemon candy doesn t work . There is one more option available which is also ver effective that is Shock wave treatment (lithotripsy) . Hope your concern has been resolved. Get Well Soon. Best Wishes, Dr. Harry Maheshwari