A hard bag bulging behind the ear without pain or itching may be a bony sign of the mastoid behind the ear, or it may be a swollen lymph node or sebaceous cyst, etc., which needs to consult a doctor in time for a clear diagnosis.
1. Mastoid: the mastoid protrudes from the bottom surface of the mastoid part of the temporal bone in a conical protrusion, which is palpable on the surface of the body and is located at the back of the external auditory canal and the outside of the mastoid process. It is a normal bony sign and is painless.
2. Enlarged lymph nodes: Enlarged lymph nodes behind the ear may be related to middle ear inflammation and parotid inflammation stimulation. It can be further evaluated by blood routine, ultrasound and other examinations.
3. Sebaceous cysts: usually caused by local sebaceous gland secretion, the secretion continues to accumulate and cause the local skin to appear hard bag phenomenon, serious cases also need surgical treatment.
If you have a hard bump behind your ear, it is recommended that you go to the hospital in time to have the cause clarified through ultrasound and other tests.