Medically reviewed by Sukaina Hasnie, MD Key Takeaways A lump behind the ear can be caused by swollen lymph nodes, which are common and usually harmless.Most lumps behind the ear are benign and can be ...

A lump on the neck may be a swollen lymph node from a bacterial or viral infection. Swollen lymph nodes can be painful, warm, and red. An unusual lump may need to be checked by a doctor to find out ...