Painful Lumps in the Armpit: Causes and Concerns

There is a hard lump in the armpit?

Recently, I discovered a small hard lump about 1cm x 0.Xcm in size in my right armpit (where the armpit hair grows, approximately parallel to the chest).
It feels hard and is painful to touch, but I don't feel it under normal circumstances.
It becomes more noticeable when I raise my arm, as it protrudes.
It is movable (I can pinch it and rotate it around, but when I release it, it returns to its original position).
This is the first time I've noticed it, and I'm unsure what it is.

Guan Xiansheng, 10~19 year old female. Ask Date: 2016/03/12

Dr. Lai Yicheng reply Oncology

Dear Mr.
Kuan,
Thank you for your letter.
In response to your description of a small hard lump (approximately 1cm x 0.Xcm) located in the axillary region, which is painful to touch and is roughly parallel to the chest, I personally believe it resembles a subcutaneous cyst.
I recommend that you visit a dermatologist for an examination, and if necessary, a pathological biopsy for diagnosis.
If you need treatment at our hospital, I can refer you to a specialist for further care.
Changhua Hospital is concerned about your health.
Radiation Oncology Department
Dr.
Lai Yi-Cheng (Director)

Reply Date: 2016/03/12

More Info

When you discover a painful lump in your armpit, it can understandably cause concern and anxiety. The armpit area, or axilla, contains various structures, including lymph nodes, sweat glands, and fatty tissue. A lump in this area can arise from several causes, and understanding these can help alleviate some of your worries.

Possible Causes of a Lump in the Armpit
1. Lymphadenopathy: One of the most common causes of a lump in the armpit is swollen lymph nodes. Lymph nodes can become enlarged due to infections (like a cold or flu), inflammatory conditions, or more serious issues like malignancies. If the lump is tender and painful, it may indicate an active infection or inflammation.

2. Cysts: Sebaceous cysts or epidermoid cysts can develop in the skin and may feel firm or rubbery. These are generally benign and can be painless unless they become infected.

3. Lipomas: These are benign tumors made of fat tissue. They are usually soft, movable, and painless. However, if a lipoma becomes large or is located in a sensitive area, it may cause discomfort.

4. Infections: Conditions like hidradenitis suppurativa, which involves painful lumps due to blocked sweat glands, can occur in the armpit area. This condition can lead to recurrent abscesses and scarring.

5. Other Conditions: Rarely, more serious conditions such as lymphoma or breast cancer can present as lumps in the armpit. If the lump is hard, fixed, and associated with other symptoms like weight loss, night sweats, or fever, it is crucial to seek medical evaluation.

When to Seek Medical Attention
Given that the lump is painful and noticeable when you raise your arm, it is advisable to consult a healthcare professional. They will likely perform a physical examination and may recommend imaging studies, such as an ultrasound, to assess the characteristics of the lump. If there is suspicion of an infection, blood tests or a biopsy may be warranted to determine the underlying cause.

Self-Care and Management
While waiting for a medical evaluation, you can manage discomfort by:
- Avoiding Irritation: Refrain from wearing tight clothing that may rub against the area.

- Warm Compresses: Applying a warm compress can help alleviate pain and may assist in reducing swelling if the lump is due to an infection.

- Pain Relief: Over-the-counter pain relievers like ibuprofen or acetaminophen can help manage pain.

Conclusion
In summary, a painful lump in the armpit can arise from various benign to serious conditions. While it is often related to swollen lymph nodes due to infections or benign cysts, it is essential to monitor the lump for any changes in size, shape, or associated symptoms. Consulting a healthcare provider is the best course of action to ensure proper diagnosis and treatment. Early intervention can help address any potential issues and provide peace of mind.

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