Medically reviewed by Daniel More, MD Allergies occur when your immune system overreacts to allergens like pet dander, pollen ...

swollen lymph nodes typically appear as small, movable lumps about the size of a pea or bean under the skin, most commonly in the neck area, behind the ears, or under the jaw. The timing of this ...

I've had a swelling under the right side of my jaw, which sometimes is painful. At first I thought it was just a swollen gland, but now I've noticed the swelling gets worse after I've had ...