Painful Lymph Nodes Under The Armpits

What Causes Painful Lumps Under Armpits?

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.

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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:

  • Research the topic
  • Find a doctor with the time
  • Use a diagnostic computer system.
The process is the same, whichever method is used.

Step 1: List all Possible Causes

We begin by identifying the disease conditions which have "painful lumps under armpits" as a symptom.  Here are eight possibilities:
  • Enlarged Lymph Nodes
  • HIV/AIDS
  • Lymphatic Congestion
  • Infectious Mononucleosis
  • Sarcoidosis
  • CLL Leukemia
  • Vasectomy Side-Effects
  • Valley Fever (Coccidioidomycosis)

Step 2: Build a Symptom Checklist

We then identify all possible symptoms and risk factors of each possible cause, and check the ones that apply:
highly elevated lymphocyte count
occasional confusion/disorientation
regular rashes
multiple swollen inguinal nodes
postauricular node problems
multiple painful cervical nodes
low lymphocyte count
black/brown fingernails
occasional rashes
recent onset fatigue
painful cervical nodes
bloodshot eyes
... and more than 60 others

Step 3: Rule Out or Confirm each Possible Cause

A differential diagnosis of your symptoms and risk factors finds the likely cause of painful lumps under armpits:
Cause Probability Status
HIV/AIDS 96% Confirm
Sarcoidosis 25% Unlikely
Vasectomy Side-Effects 25% Unlikely
CLL Leukemia 0% Ruled out
Infectious Mononucleosis 0% Ruled out
Valley Fever (Coccidioidomycosis) 0% Ruled out
Enlarged Lymph Nodes 0% Ruled out
Lymphatic Congestion 0% Ruled out
* This is a simple example to illustrate the process

Arriving at a Correct Diagnosis

The Analyst™ is our online diagnosis tool that learns all about you through a straightforward process of multi-level questioning, providing diagnosis at the end.

If you indicate recent swollen/painful lymph nodes, The Analyst™ will ask further questions including this one:
UNDER ARMPITS: Do you have any tender or painful lymph nodes here?
Possible responses:
→ Don't know
→ No
→ Often, but not right now
→ 1-2 lymph nodes painful
→ 3 or more nodes painful
Based on your response to this question, which may indicate no painful axillary nodes, frequent painful axillary nodes, painful axillary nodes or multiple painful axillary nodes, The Analyst™ will consider possibilities such as:
Enlarged Lymph Nodes

Enlarged Lymph Nodes also suggests the following possibilities:

... and also rule out issues such as:
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