In rare cases, surgery may be needed to remove a tumor or treat an infection. A lump behind the ear can be caused by many things, including a swollen lymph node, sebaceous cysts, skin tags, lipomas, ...

Sebaceous cysts occur in many parts of the body, including the breasts and armpits. The typically small, round, hardened bumps may be entirely painless or cause significant pain, redness, and swelling ...

Measles is highly contagious and can spread from one person to nine out of 10 people close to them, according to the CDC, which notes a person infected with measles can spread it to others four ...