Generally the root of the ear is the place where the earlobe meets the face. The root of the ear is the place where the earlobe meets the face, that is, the vertical end of the ear is called the root of the ear, and the place at the bottom of the earlobe near the face is the root of the ear. The root of the ear is the gathering place of lymph nodes behind the ear, if there are enlarged lymph nodes here, it can indicate inflammation of the head and face, as well as malignant tumors in some special areas such as the nasopharynx. If there is a lump here, it is necessary to distinguish it from a lymph node or a sebaceous cyst. Sebaceous cysts are usually caused by blockage of the sebaceous ducts in the local skin and sebum retention, resulting in a localized lump. In addition, if there is pain at the root of the ear, it may be caused by folliculitis, trauma, otitis externa, acute otitis media, and so on. Therefore, if there is discomfort at the root of the ear, you should consult a doctor to find out the cause of the problem.