Small Lumps in the Armpit: Causes and Treatment

There is a small lump in the armpit?

I have a small round hard lump under my armpit, about the size of a mosquito bite.
It is slightly red, and it hurts a bit and feels prickly when I press it gently.
Could this be a lymph node issue, or is it related to my breast? What should I do about it...
I'm really worried.

Qia Qia, 20~29 year old female. Ask Date: 2006/05/09

Dr. Lai Jihong reply Surgery

As you described, the small hard lump in your armpit is red and tender to the touch.
It is likely related to an infection.
Clinically, it could be suspected as an infected sebaceous cyst or infectious lymphadenitis, which may be associated with inflammation from a wound on the arm or breast.
It is recommended that you follow up with a surgical specialist for further evaluation and treatment.
Wishing you good health.

Reply Date: 2006/05/09

More Info

When it comes to small lumps in the armpit, there are several potential causes, and understanding these can help you determine the best course of action. The lump you described, which is round, firm, slightly red, and painful to the touch, could indeed be related to the lymph nodes, but it may also be associated with other conditions.

One common cause of lumps in the armpit is swollen lymph nodes. The lymphatic system plays a crucial role in your immune response, and lymph nodes can become enlarged due to infections, inflammation, or even malignancies. If you have recently had an infection, such as a cold or flu, or even a localized skin infection, this could lead to lymphadenopathy (swelling of the lymph nodes). In this case, the lump may be a reactive lymph node responding to the infection.

Another possibility is that the lump could be a sebaceous cyst, which is a benign growth that can occur when a hair follicle becomes clogged with oil and dead skin cells. These cysts can sometimes become inflamed or infected, leading to pain and redness.
Additionally, the lump could be related to a condition affecting the breast tissue, especially if you are female. Conditions such as fibrocystic breast changes or even infections like mastitis can sometimes present with lumps in the axillary region.
Given your symptoms, it is essential to monitor the lump closely. If it persists for more than a couple of weeks, increases in size, or is accompanied by other symptoms such as fever, night sweats, or unexplained weight loss, it is crucial to seek medical attention. A healthcare provider may perform a physical examination and could recommend imaging studies, such as an ultrasound, to assess the lump further. In some cases, a biopsy may be necessary to rule out malignancy, especially if there are concerning features.

In terms of treatment, if the lump is due to an infection, antibiotics may be prescribed. For benign conditions like cysts, treatment may not be necessary unless they become painful or bothersome. In such cases, options include drainage or surgical removal.

In summary, while your lump could be related to lymph nodes, it is essential to consider other possibilities as well. The best course of action is to consult with a healthcare professional who can provide a thorough evaluation and appropriate management based on your specific situation. Remember, early intervention is key in addressing any health concerns, so don’t hesitate to seek help if you are worried.

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