The swelling of the parotid bladder may be caused by the following reasons: firstly, it may be mumps, which is usually a result of inflammatory changes in the parotid gland caused by the invasion of the parotid gland by the herpes virus, usually with very obvious swelling and pain in the parotid gland, as well as flushing of the skin and increased skin temperature. Secondly, the swelling of lymph nodes may be caused by localized swelling of lymph nodes, which is usually caused by the spread of some upper respiratory tract infections to the lymph nodes, most often caused by acute pharyngitis or acute tonsillitis, in addition to localized swelling and pain accompanied by sore throat or other symptoms of upper respiratory tract infections such as nasal congestion, runny nose and cough. The third may be caused by local sebaceous cysts with purulent infection, which can usually be felt as hard nodules in the cheekbone, which is caused by local inflammation after eating foods that are easily inflamed or staying up late, resulting in redness and pain in the cheekbone.