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 University of California, Riverside team of scientists has found that Toxoplasma gondii, a common parasite affecting up to one-third of the global population, is far more complex than previously ...