Painful Lump Under Right Armpit: Should You Be Concerned?

There is a small hard lump under the right armpit that is tender to the touch?

There is a small hard lump under my right armpit that hurts when pressed.
I don't recall anything on the left side, but I have had this for several years.
The lump used to be larger.
Should I go to the hospital for an examination? Could it be cancer?

Jinzhang de xiao nüzi, 20~29 year old female. Ask Date: 2015/12/30

Dr. Chen Sirong reply Oncology

Nervous young woman / 23 years old / Female
1.
I have had a lump for several years; it was larger before but has since decreased in size.
It does not seem like cancer.
2.
Should I go to the hospital for an examination? Is it cancer? However, I am unsure if it could turn into cancer if it continues to be left untreated.
If it increases in size, changes color, or presents symptoms such as pain, then I would need to see a doctor.
Thank you for your letter.
Taoyuan Hospital
Chen Si-Rong

Reply Date: 2015/12/30

More Info

When it comes to a painful lump under the armpit, it is essential to approach the situation with caution and awareness. The presence of a lump in the armpit area, especially if it has been there for several years and has changed in size or tenderness, warrants a medical evaluation. While many lumps can be benign, such as swollen lymph nodes, cysts, or lipomas, there is also a possibility that they could indicate a more serious condition, including infections or malignancies.

Given your description of the lump being painful and having increased in size over time, it is advisable to seek medical attention. A healthcare provider will likely perform a physical examination and may recommend imaging studies, such as an ultrasound, to assess the characteristics of the lump. In some cases, a biopsy may be necessary to determine the nature of the lump definitively.

Lumps in the armpit can arise from various causes, including:
1. Lymphadenopathy: Swollen lymph nodes can occur due to infections, inflammation, or malignancies. The armpit contains several lymph nodes that can become reactive due to localized infections or systemic conditions.

2. Cysts: These are fluid-filled sacs that can develop in various tissues, including the skin and subcutaneous tissue. They are generally benign but can become inflamed or infected, leading to pain.

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

4. Infections: Skin infections, such as abscesses or folliculitis, can cause painful lumps in the armpit area. These may require drainage and antibiotic treatment.

5. Malignancies: While less common, lumps in the armpit can be indicative of breast cancer or other cancers that have spread to the lymph nodes. Early detection is crucial for effective treatment.

Given that you have noticed this lump for several years, it is essential to monitor any changes in size, shape, or pain level. If the lump becomes larger, more painful, or if you develop other symptoms such as fever, night sweats, or unexplained weight loss, these could be red flags that necessitate immediate medical evaluation.

In conclusion, while not all lumps are cancerous, the persistence and pain associated with your lump under the right armpit should not be ignored. It is highly recommended that you schedule an appointment with a healthcare provider for a thorough evaluation. Early diagnosis and treatment are key to addressing any potential issues effectively. Remember, it is always better to err on the side of caution when it comes to your health.

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