A lump behind the ear may be caused by enlarged lymph nodes behind the ear, sebaceous cysts and folliculitis.
Acute and chronic inflammation of the head and neck can often cause enlargement and hyperplasia of lymphatic tissues in the neck, and lymphatic tissues are widely spread behind the ear. When suffering from otitis media, tonsillitis, pharyngitis and other diseases, the lymph nodes behind the ear can reactively increase in size, and if accompanied by pain, then it will be lymph node inflammation behind the ear. Some head and neck tumors can also stimulate or metastasize causing lymph node enlargement behind the ear.
Sebaceous cyst behind the ear is also a common cause of these symptoms, due to the sebaceous gland ducts blocked to form cystic hyperplastic lesions of varying sizes, some patients do not have obvious symptoms, but there are also acute infections that occur in the pain of the patient, you can choose to dynamically observe the doctor after examination or surgical treatment.
Folliculitis can also cause bumps behind the ears, mostly due to bacterial infection.
There are many diseases that cause this feature, you should go to the hospital in time, after clarifying the cause of the targeted treatment.