Lumps in the Armpit: Causes and When to Seek Help - Family Medicine

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Lumps in the armpit can be concerning, and it's important to understand the potential causes and when to seek medical help. The lump you described, approximately one centimeter in size, movable, and not painful, could be due to several benign conditions, but it is essential to evaluate it properly.


Possible Causes of Lumps in the Armpit
1. Lymphadenopathy: One of the most common reasons for a lump in the armpit is swollen lymph nodes. This can occur due to infections (like a cold or skin infection), inflammatory conditions, or even cancer. The lymph nodes can become enlarged as they work to filter out pathogens or respond to inflammation.

2. Sebaceous Cysts: These are non-cancerous lumps that can form under the skin. They are often filled with a fatty substance and can be movable. They are usually harmless but can become infected.

3. Lipomas: These are soft, fatty lumps that grow under the skin. They are generally painless and movable, and they are benign.

4. Folliculitis or Ingrown Hairs: Sometimes, hair follicles can become inflamed or infected, leading to small, painful lumps. This is more common in areas with hair, including the armpits.

5. Skin Conditions: Conditions like hidradenitis suppurativa can cause painful lumps in the armpits due to blocked sweat glands.

6. Malignancies: While less common, lumps in the armpit can also be a sign of more serious conditions, including lymphoma or breast cancer, especially if there are other concerning symptoms.


When to Seek Medical Help
You should consider seeking medical attention if you notice any of the following:
- The lump increases in size or changes in shape.

- It becomes painful or tender.

- You experience other symptoms such as fever, night sweats, unexplained weight loss, or fatigue.

- There are changes in the skin over the lump, such as redness or warmth.

- You have a history of cancer or other significant health issues.


Diagnosis and Evaluation
When you visit a healthcare provider, they will likely perform a physical examination and may ask about your medical history, any recent infections, or other symptoms. Depending on the findings, they might recommend further tests, such as:
- Ultrasound: To assess the characteristics of the lump.

- Blood tests: To check for signs of infection or other underlying conditions.

- Biopsy: If there is a concern about malignancy, a small sample of tissue may be taken for analysis.


Conclusion
While many lumps in the armpit are benign and not a cause for concern, it is essential to monitor any changes and consult a healthcare professional if you have any doubts. Early evaluation can help rule out serious conditions and provide peace of mind. If you are experiencing persistent itching or changes in the skin, it is advisable to seek medical advice sooner rather than later. Remember, it's always better to be cautious when it comes to changes in your body.