Underarm Pain: Causes, Symptoms, and When to Seek Help - Family Medicine

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Underarm pain can be a concerning symptom, and understanding its potential causes, symptoms, and when to seek medical help is crucial for proper management. Based on your description, it seems that you are experiencing pain in your left underarm area, which is radiating from the side to the armpit, accompanied by a sensation of swelling and tenderness when pressure is applied. This could be indicative of several underlying issues.


Possible Causes of Underarm Pain
1. Muscle Strain: One of the most common causes of localized pain in the underarm area is muscle strain. If you have been engaging in activities that involve repetitive arm movements or if you sleep on your left side for extended periods, this could lead to muscle fatigue or strain, resulting in pain.

2. Lymphadenopathy: The underarm area contains lymph nodes, which can become swollen due to infections, inflammation, or other medical conditions. If you are experiencing tenderness and swelling, it could be related to lymph node enlargement, possibly due to a mild infection or even a reaction to a recent vaccination.

3. Nerve Compression: Conditions such as thoracic outlet syndrome, where nerves or blood vessels are compressed in the space between your collarbone and your first rib, can cause pain that radiates to the underarm area.

4. Injury: Even if you do not recall a specific injury, minor trauma or repetitive strain can lead to pain in the underarm area.
5. Other Medical Conditions: While less common, conditions such as shingles, which can cause pain and sensitivity in the skin, or even more serious conditions like heart issues (though typically accompanied by other symptoms), should not be overlooked.


Symptoms to Watch For
- Swelling: If the swelling persists or increases, it may indicate an underlying issue that needs further evaluation.

- Fever or Chills: These symptoms could suggest an infection, which may require medical attention.

- Changes in Skin Color or Texture: Any unusual changes in the skin over the painful area should be assessed by a healthcare professional.

- Radiating Pain: If the pain spreads to other areas, such as the chest or arm, it could be a sign of a more serious condition.


When to Seek Help
If the pain persists for more than a few days, worsens, or is accompanied by other concerning symptoms (such as fever, significant swelling, or changes in sensation), it is advisable to seek medical attention. Given your symptoms, it would be appropriate to consult with a primary care physician or a specialist in musculoskeletal disorders, such as an orthopedic doctor. They can perform a thorough examination, possibly including imaging studies, to determine the exact cause of your pain.


Self-Care and Management
In the meantime, you may consider some self-care measures:
- Rest: Avoid activities that exacerbate the pain.

- Ice Therapy: Applying ice to the affected area can help reduce swelling and numb the pain.

- Over-the-Counter Pain Relief: Non-steroidal anti-inflammatory drugs (NSAIDs) like ibuprofen can help alleviate pain and reduce inflammation.

- Gentle Stretching: If the pain is related to muscle strain, gentle stretching may help relieve tension.


Conclusion
While underarm pain can often be benign and self-limiting, it is essential to monitor your symptoms closely. If you notice any worsening or additional symptoms, do not hesitate to seek medical advice. Early intervention can lead to better outcomes and peace of mind.