Armpit Lump: When to Worry and When to Relax

Armpit Lump

A lump in your armpit can be a cause for concern, but it’s important to remember that not all lumps are cancerous. In fact, most armpit lumps are benign, or non-cancerous. However, it’s always best to err on the side of caution and get any new lump checked out by a doctor.

What causes armpit lumps?

There are many things that can cause a lump in your armpit, including:

  • Swollen Lymph Nodes: These are part of the immune system and can become enlarged due to infections like the flu or bacterial/viral illnesses. Lymph nodes act as filters, trapping germs and abnormal cells. When they swell, it’s usually a sign that your immune system is working hard to fight off an infection. Swollen lymph nodes can also be triggered by allergic reactions or autoimmune disorders, where the immune system mistakenly attacks the body’s own tissues.

    Common infections like strep throat, mononucleosis, or respiratory infections can all cause temporary swelling of the lymph nodes, especially in the armpit area. Sometimes, localized infections like infected cuts or scrapes near the armpit can cause this reaction. In more serious cases, swollen lymph nodes may indicate a deeper issue, such as tuberculosis, HIV, or certain cancers like lymphoma or leukemia.

    Autoimmune diseases like rheumatoid arthritis or lupus may cause generalized lymph node swelling, including in the armpits. In these conditions, the body’s immune system is in a constant state of activation, causing inflammation and swelling in various parts of the body, including lymph nodes.

  • Fibroadenomas: These are benign, non-cancerous breast lumps that most commonly affect younger women, typically between the ages of 15 and 35. These lumps are often firm, smooth, and moveable under the skin. Though harmless, they can be alarming due to their size and feel. Fibroadenomas are often hormonally influenced and may become more prominent during pregnancy or menstruation when hormonal fluctuations occur. They generally do not require treatment unless they become large or cause discomfort.

    Some women may develop multiple fibroadenomas at once, a condition known as fibroadenomatosis. While fibroadenomas do not increase the risk of breast cancer, it’s essential to monitor them for any changes in size or texture, as any new breast lump should be evaluated by a healthcare provider.

  • Lipomas: These are soft, benign tumors made up of fat cells that can develop anywhere under the skin, including the armpit. Lipomas tend to be slow-growing, painless, and movable, giving them a characteristic “doughy” feel. They are not cancerous and rarely become malignant. Lipomas can vary in size, ranging from small, barely noticeable lumps to larger growths.

    While lipomas are generally harmless, some people may choose to have them removed if they become unsightly or bothersome. Liposuction or minor surgery can typically resolve them. In rare cases, lipomas can grow in more sensitive areas or press on nerves, causing discomfort.

  • Hidradenitis Suppurativa (HS): HS is a chronic, inflammatory skin condition that leads to the development of painful boils, abscesses, and lumps, most commonly in the armpits, groin, or buttocks. It occurs when hair follicles become blocked, leading to swelling and inflammation. Over time, HS can cause tunnels to form under the skin, leading to chronic infections and scarring.

    This condition is believed to be related to an abnormal response of the immune system, and it’s often misdiagnosed because its symptoms mimic those of other skin conditions. The exact cause of HS is unclear, but it’s more common in women, particularly those who are overweight or have a family history of the disease. There is no cure for HS, but treatments such as antibiotics, anti-inflammatory medications, and, in severe cases, surgery can help manage symptoms and prevent flare-ups.

  • Breast Cancer: Though rarer, a lump in the armpit could also signal breast cancer. In these cases, cancerous cells from the breast may spread to the lymph nodes in the armpit, causing a firm, hard, and fixed lump. Unlike benign lumps, cancerous lumps are usually painless and immovable. Breast cancer lumps may also be associated with other symptoms like changes in the breast’s appearance, nipple discharge, or skin dimpling.

    Armpit lumps related to breast cancer are more likely to occur in individuals over 40 or those with a family history of the disease. If breast cancer is suspected, doctors may recommend further diagnostic tests like a biopsy, mammogram, or ultrasound to assess the nature of the lump and decide on the appropriate treatment plan.

 

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When to see a doctor

If you notice a new lump in your armpit, it’s important to see a doctor to get it checked out. Your doctor will ask you about your symptoms and may do a physical exam and order some tests, such as a mammogram or ultrasound.

You should see a doctor right away if you have any of the following symptoms:

  • A lump that is hard, fixed, and painless
  • A lump that is growing quickly
  • A lump that is red, tender, or warm to the touch
  • Discharge from the nipple
  • Swollen lymph nodes in your neck or collarbone

Treatment for armpit lumps

The treatment for an armpit lump will depend on the cause of the lump. If the lump is benign, no treatment may be necessary. However, if the lump is cancerous, treatment may include surgery, radiation therapy, and chemotherapy.

Prevention tips

There is no foolproof way to prevent armpit lumps, but there are a few things you can do to reduce your risk, such as:

  • Perform regular breast self-exams
  • Maintain a healthy weight
  • Avoid smoking
  • Limit your alcohol intake
  • Eat a healthy diet

Living with an armpit lump

If you have been diagnosed with a benign armpit lump, you may not need any treatment. However, it’s important to keep an eye on the lump and see your doctor if it changes in size, shape, or color.

If you have been diagnosed with breast cancer, your doctor will develop a treatment plan that is right for you. There are many effective treatments available for breast cancer, and the vast majority of people with breast cancer live long and healthy lives.

In conclusion, armpit lumps can be caused by a variety of things, most of which are benign. However, it’s important to see a doctor to get any new lump checked out. Early diagnosis and treatment is key to managing any potential health issues.

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