A lump under the right parotid with slight pain when pressed may be related to parotitis, enlarged lymph nodes, lipoma and other reasons. 1. Mumps: If the right parotid occurs inflammatory reaction, it can cause the gland to increase in size, which can be manifested as a lump under the parotid with slight pain when pressed. 2. Enlarged lymph nodes: If the right side of the head and face, the right side of gingivitis, pulpitis and other bacterial infections, the pathogenic bacteria can flow into the lymph nodes near the right parotid through the lymphatic vessels, causing inflammatory reaction of the lymph nodes, the lymph nodes appear enlarged, and there is a painful sensation when pressed. 3. Lipoma: If there is a lipoma in the right cheek area, most of them will not be painful, but will be painful when pressing the nerve or pus and inflammation. If you find a lump under your right cheek and have a slight pain when pressed, you should go to the hospital in time to clarify the cause of the disease and carry out standardized treatment under the guidance of the doctor.