Swollen lymph nodes, infections or cysts, skin irritations, and chronic disorders can all cause armpit lumps in both men and women. The lymphatic system drains fluid from cells which is essentail for the immune system. Axillary lumps can vary in size from a pea to a golf ball and armpit lumps usually disappear on their own. These can be an indication of cancer in rare instances.
Armpit Lumps - Causes, Symptoms and Treatment
An armpit lump is a swelling or a bump under the arm that can have many causes. The article below details the same.