Swollen cheeks without pain or itching may be due to inflammation of the parotid ductal opening or obstruction of the ductal opening due to stones, which can cause retention of saliva and make the cheeks swollen, and the swelling is more obvious after eating. In this case, it is recommended to eat more sour foods, such as oranges and lemons, to promote saliva secretion and flush out the blocked ducts. If there is a dental disease in the mouth it can swell the lymph nodes inside the parotid gland, which can also make the parotid gland swollen. The other cause of swelling in the parotid gland is a parotid swelling, more commonly known as pleomorphic adenoma, which is mainly benign and causes swelling in the parotid gland, and is usually painless and has no obvious clinical symptoms in the early stages.