A lump under the right ear is a localized tissue abnormality, which may be caused by mumps, parotid tumors, folliculitis, and enlarged local lymph nodes. 1. Mumps: Inflammation of the parotid gland due to various reasons may lead to blockage of the glandular ducts, which may further lead to localized enlargement, resulting in the formation of a lump. 2. Parotid tumor: benign and malignant tumors of the parotid gland can cause the formation of lumps in the corresponding parts, the most common one is parotid gland adenolymphoma. 3. Folliculitis: localized inflammation of hair follicles leads to blockage of hair follicles, which can also cause accumulation of local secretions, leading to the formation of lumps. 4. Enlarged lymph nodes: the presence of enlarged lymph nodes in the angle of the jaw can also cause this feature. Lumps under the right ear are also seen in other causes, you can actively consult a doctor for systematic examination, after a clear diagnosis, follow the doctor’s instructions to standardize the treatment, to avoid causing delays in the condition.