How to Handle a Hard Lump Under Your Armpit: Symptoms and Next Steps

If you discover a lump in your armpit, what is the best way to handle it?

About one or two months ago, I discovered a hard lump under my left armpit, approximately 3cm by 4cm in size.
Sometimes, I experience cramping pain starting from that area, which can radiate to my entire left side, lasting for about 15-20 minutes before easing.
However, I usually do not feel anything there, and I only noticed it suddenly while taking a shower.
After researching a bit, I am still uncertain about what symptoms I might be experiencing, and it has only recently started to cause some dull pain, prompting me to seek help.

1.
Based on these symptoms, what types of issues or diseases could potentially be indicated?
2.
Which medical specialty should I consult?
3.
What tests should I undergo to confirm whether it is a tumor or cancer?

Jin, 20~29 year old female. Ask Date: 2023/11/12

Dr. Chen Sirong reply Oncology

Hello, Jin, 23 years old, male.

1.
Based on these symptoms, what type of issues or diseases could be initially suspected?
A: Benign tumor or malignant tumor.
2.
Which specialty should I consult?
A: General Surgery.
3.
What tests should I undergo to confirm whether it is a tumor or cancer?
A: Physician's physical examination, ultrasound, computed tomography (CT) scan.
Wishing you good health,
Taoyuan Hospital, Dr.
Chen Sih-Rong.

Reply Date: 2023/11/12

More Info

When you discover a hard lump under your armpit, especially one that is accompanied by pain or discomfort, it can understandably cause concern. Here’s a comprehensive approach to understanding your symptoms and the next steps you should take.

Possible Causes of the Lump
1. Lymphadenopathy: The most common cause of a lump in the armpit is swollen lymph nodes, which can occur due to infections (like a cold or flu), inflammatory conditions, or even cancer. The pain radiating to the left side of your body could be related to nerve irritation or referred pain from the lymph nodes.

2. Cysts: Sebaceous cysts or other types of cysts can form under the skin and may feel hard. They are generally benign but can become infected, leading to pain and swelling.

3. Lipomas: These are benign tumors made of fat tissue. They are usually soft, movable, and painless, but can sometimes cause discomfort if they press on nearby structures.

4. Infections: Conditions like abscesses or infections in the skin or deeper tissues can lead to painful lumps. These may require drainage and antibiotics.

5. Malignancies: While less common, lumps can also be indicative of more serious conditions such as lymphoma or breast cancer, especially if there are accompanying symptoms like unexplained weight loss, night sweats, or persistent pain.

Recommended Next Steps
1. Consult a Healthcare Provider: Given the symptoms you've described, it is crucial to see a healthcare professional. You should consider visiting a primary care physician or a specialist in internal medicine. If the lump is suspected to be related to lymph nodes, a referral to an oncologist or a hematologist may be necessary.

2. Diagnostic Tests: Your doctor may recommend several tests to evaluate the lump:
- Physical Examination: A thorough examination of the lump and surrounding areas.

- Ultrasound: This imaging test can help determine the nature of the lump (solid vs. cystic) and assess the surrounding lymph nodes.

- Blood Tests: These can help identify signs of infection or other systemic issues.

- Biopsy: If there is suspicion of malignancy, a biopsy may be performed to obtain tissue for pathological examination.

3. Monitoring Symptoms: Keep track of any changes in the lump, such as size, shape, or associated symptoms (like fever, weight loss, or increased pain). This information will be valuable for your healthcare provider.

Conclusion
While the lump under your armpit could be due to a variety of benign conditions, the presence of pain and the specific characteristics of the lump warrant a thorough evaluation. Early diagnosis and treatment are crucial, especially if there is a possibility of malignancy. Do not delay seeking medical attention, as timely intervention can lead to better outcomes. Remember, it’s always better to err on the side of caution when it comes to unexplained lumps or changes in your body.

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