A painful, increasing swelling below the ear, diagnosed as a salivary gland stone that is not improving after 5 days of medicines, likely means the blockage is still present and may need a procedure rather than tablets alone. You should see an ENT specialist or oral surgeon promptly for further evaluation; tests like an ultrasound may be done, and treatment may involve procedures to remove the stone (such as gentle extraction, endoscopic removal, or a small surgery if needed). In the meantime, you can stay well hydrated, apply warm compresses, gently massage the area, and suck on sour candies or lemon to stimulate saliva flow, which sometimes helps move the stone. Do not delay care, especially if swelling is increasing, as an untreated blockage can lead to infection or abscess formation.