What causes a painful lump behind the ear when pressed, and what should be done?

A bony protrusion behind the ear that is painful upon palpation may be caused by improper sleeping posture, muscle tension, trauma, lymphadenitis, or folliculitis. Improvement can be achieved through posture adjustment, muscle relaxation, ice compresses, and medication. Detailed explanations are as follows:

1. Improper sleeping posture: Prolonged lateral or prone sleeping can compress the mastoid process (the bony area behind the ear), causing poor local blood circulation and resulting in soft tissue damage and an inflammatory response, which leads to tenderness upon pressure. It is recommended to adjust sleeping posture and preferably adopt a supine position to avoid compressing the mastoid process.

2. Muscle tension: Prolonged periods of looking down at a mobile phone or working at a desk can cause tension in the neck muscles. The muscles behind the ear are connected to the neck muscles, which can lead to pain around the mastoid. It is recommended to relax the muscles around the neck and ear area, which can be achieved through massage or performing neck stretching exercises.

3. Trauma: Impact to the bone behind the ear from incidents such as accidental falls or bumps can cause local tissue damage and rupture of capillaries, leading to hematoma. This may cause the area behind the ear to bulge and feel painful upon pressure, often accompanied by bruising. It is recommended to wrap ice in a towel and apply it to the area behind the ear to promote vasoconstriction and relieve pain.

4. Lymphadenitis: When immune function is reduced, pathogenic microorganisms may invade the lymph nodes around the ear, causing lymphadenitis and a local inflammatory response, which leads to swollen lymph nodes. The area behind the ear may bulge and be painful. It is recommended to take medications such as roxithromycin tablets or amoxicillin capsules as directed by a physician to reduce inflammation.

5. Folliculitis: Remaining in a high-temperature environment for prolonged periods or neglecting skin hygiene may damage the hair follicles behind the ear, allowing Staphylococcus aureus to invade and cause a local inflammatory response, resulting in noticeable swelling. This can cause a protrusion and tenderness upon pressure. It is recommended to use medications such as mupirocin ointment or ketoconazole cream under a physician's guidance to alleviate discomfort.

In daily life, it is recommended to rest appropriately and avoid rubbing or squeezing the ears. If symptoms persist, timely medical attention is advised.