Hi, thanks for writing to HCM.
Based on your description, I suspect that the lumps in your armpit could possibly be enlarged axillary lymph
nodes. These enlarged nodes indicates infection in the surrounding areas.
A detailed clinical examination is necessary to establish a possible cause for their enlargement.
In the meantime, use of some antiinflammatory medicine like Advil
will help in reducing the pain.
Hope this information is helpful. Good day