They're located throughout the body in the armpits (called axillary lymph nodes), the groin, neck and chest. The nodes can become swollen and painful, usually when the body is fighting off infections.

There are around 600 lymph nodes located throughout the body, many of which are clustered in the armpit, groin, and neck. They vary in size from a few millimeters to up to 1.5 centimeters in diameter.

Cysts (fluid-filled tissue pockets), infections, and swollen lymph nodes commonly cause armpit lumps. Finding a lump in your armpit can be worrisome, especially if it hurts or appears unexpectedly.

There are lots of lymph nodes in your body. But they can be felt easiest in your groin, armpit and neck. If the cancer has spread to your lymph nodes they can feel hard or swollen. Swollen lymph nodes ...

The initial physical exam was significant for fever of 101.5[degree]F and multiple, discrete, palpable lymph nodes approximately 2cm x 2cm in the cervical, axillary, and inguinal regions bilaterally.