A hard lump inside the cheek needs to be judged in conjunction with other symptoms. If there is swelling and pain, it may be caused by inflammation and infection, usually seen in inflammation in the mouth, causing swollen lymph nodes, or local soft tissue inflammation caused. It does not affect your body much, you just need to pay attention to oral hygiene, brush your teeth every morning and evening, rinse your mouth after meals, and keep your mouth clean and hygienic. It may also be a parotid cyst or tumor, if the hard lump does not disappear for a long time, or even becomes bigger. It is advisable to go to the hospital in time for ultrasound examination and consider surgery to remove it if necessary.