Painful lumps under armpits can have various causes, ranging in severity from 'troubling' to 'critical'. Finding the true cause means ruling out or confirming each possibility – in other words, diagnosis.
Diagnosis is usually a complex process due to the sheer number of possible causes and related symptoms. In order to diagnose painful lumps under armpits, we could:
|Valley Fever (Coccidioidomycosis)||29%||Unlikely|
|Enlarged Lymph Nodes||1%||Ruled out|
|Infectious Mononucleosis||0%||Ruled out|
|Vasectomy Side-Effects||0%||Ruled out|
|CLL Leukemia||0%||Ruled out|
UNDER ARMPITS: Do you have any tender or painful lymph nodes here?
Possible responses:→ Don't know
→ Often, but not right now
→ 1-2 lymph nodes painful
→ 3 or more nodes painful
Enlarged Lymph Nodes also suggests the following possibilities: