Molecular Any injury sustained from blunt force, which may be related to MVAs, or mishaps, falls or jumps, blows or crush injuries from animals, blunt objects or unarmed assailants. Cf Penetrating trauma. A wound in which the surface of the skin remains intact, caused by impact or collision with a blunt object, e.g., an automobile fender.
Mastoiditis occurs when ear infections cause infection in the mastoid bone. The mastoid bone can be found directly behind the ear. Mastoiditis causes the area behind the ear to swell and protrude out of the skin. The bump behind ear is accompanied with fever, ear pain, hearing loss and ear redness.
It is important to bring your swollen lymph node behind the ear to the attention of your doctor. Here are some common causes of swollen lymph nodes behind the ear. Infections: Infections, such as fungal infection, bacteria in the mouth, and mononucleosis, can all contribute to swollen lymph nodes behind the ear.