Lumps Under the Armpits: Inflammation or Something More?

There are hard lumps on both sides of the armpits?

Last year, I experienced pain under my left armpit, and when pressed, I could feel a lump that was also purulent.
At that time, I went to a clinic and applied medication, which resolved the issue.
On the right side, there was a lump smaller than a grain of millet, which also caused pain.
When the left side resolved, the right side did as well.
Recently, there has been a recurrence; the left side is purulent again, and the right side has developed a growth resembling a sarcoma, measuring 0.3-0.5 cm, but there is no pain associated with it.
I still feel lumps on both sides.
Doctor, could this still be inflammation?

Wu Tongxue, 20~29 year old female. Ask Date: 2020/11/03

Dr. Hu Ziren reply Oncology

A painful lump in the armpit that is purulent is likely just folliculitis or another localized subcutaneous inflammation.
It is recommended to monitor the condition.

Reply Date: 2020/11/03

More Info

When it comes to lumps under the armpits, it's essential to consider various potential causes, ranging from benign conditions to more serious health issues. Based on your description, it seems that you have experienced recurrent lumps and inflammation in both armpits, with one side showing signs of pus formation and the other developing a growth resembling a small tumor.
The initial occurrence of a painful lump that resolved with topical treatment suggests a possible localized infection or inflammation, such as a sebaceous cyst or an abscess. These types of lumps can form when hair follicles become blocked or infected, leading to the accumulation of pus. The fact that the lump on the left side resolved after treatment indicates that it was likely an inflammatory process that responded to the medication.

The presence of a small lump on the right side, which also caused discomfort but eventually disappeared, further supports the idea of a transient inflammatory response. However, the recent recurrence of symptoms, particularly the development of a new growth on the right side that resembles a tumor, warrants further investigation. While it may still be related to inflammation, the characteristics of the lump, such as its size, texture, and lack of pain, could indicate a different underlying issue.

In general, lumps under the armpits can be caused by several factors, including:
1. Infections: Bacterial infections can lead to abscess formation, which may present as painful lumps filled with pus. These often require drainage and antibiotics for resolution.

2. Lymphadenopathy: Enlarged lymph nodes can occur due to infections, autoimmune conditions, or malignancies. Lymph nodes in the armpit can become swollen in response to infections in the arms, breasts, or other areas.

3. Cysts: Sebaceous cysts are common and can become inflamed or infected, leading to pain and pus formation.

4. Tumors: While less common, lumps can also be benign tumors (such as lipomas) or malignant tumors (such as lymphomas or breast cancer). The growth resembling a tumor on the right side should be evaluated to rule out any serious conditions.

5. Inflammatory Conditions: Conditions like hidradenitis suppurativa can cause recurrent lumps and abscesses in the armpit area due to inflammation of the sweat glands.

Given the recurrence of symptoms and the new growth, it is crucial to seek medical evaluation. A healthcare provider may perform a physical examination and possibly imaging studies (like an ultrasound) to assess the nature of the lumps. In some cases, a biopsy may be necessary to determine the exact cause of the growth, especially if there is any concern about malignancy.

In summary, while your symptoms may still be related to inflammation, the development of a new growth and the recurrence of previous symptoms necessitate a thorough evaluation by a healthcare professional. Early diagnosis and treatment are essential to address any underlying issues effectively. Please consult with a physician or a dermatologist for a comprehensive assessment and appropriate management of your condition.

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