What exactly are the causes of painful lymph nodes in the underarm area?

Painful lymph nodes would most likely be an infection or virus. Lymph nodes enlarged from cancer USUALLY aren't painful. That stated, there are always exceptions — cancer doesn't always play by the rules. If the nodes don’t go down within a few days or there is no explanation for why they’re enlarged, see a doctor who can evaluate whether they are something to be concerned over. A doctor needs to actually feel and see the nodes to determine whether they are a problem.

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Infections and cancers. Maybe something a little far out but my child was scratched by a cat. She had painful lymph nodes under the arm. Due to familial history of cancers we went in and swiftly got checked out. Turns out the scratch had infected her with “cat scratch fever”. A course of antibiotics and everything was good to go. Please get checked out. It is really important to do this as soon as you notice a problem. Hope this helps you out.

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Hodgkin's lymphoma, or a bacterial infection… but i would get it checked out just in case, i just had a lymph node on my neck and it wouldn't go away for 2 months, It turns out it is lymphoma cancer and i have to do chemo… get it checked out just in case

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I had pain full lymph nodes under my armpit, it turned out to be breast cancer. Please go to your Gp asp. Good luck x

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mono

infection

breast cancer