The reason for the infection needs to be investigated.
Lymph nodes do not get infected on their own.
The bug comes from somewhere else.
In women, this can be a sign of breast cancer.
Anywhere that drains to the nodes should be considered.
The sweat glands in the armpit can be infected. If this is the case, it almost always requires surgical removal of some of the glands and tracts of infection.
There are other causes as well.
Discuss this with your doctor.
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