8 Min Read
Noticing a lump under the armpit can be unsettling, especially when it doesn’t go away. While many armpit lumps may not be harmful and may be caused by infections, cysts, or lymph nodes, some lumps could mean something worse, like cancer. And this scenario is why early diagnosis is crucial. If cancer cells spread to the lymph nodes in the armpit or originate from nearby tissues, such as the breast, a lump can develop beneath the arm. Due to the potential confusion this placement can cause, it's important to know the warning signs and get evaluated by a doctor if the lump persists beyond a few weeks. After all, while not all lumps are cancerous, ignoring persistent changes can delay diagnosis.
In this blog, a medical oncologist in Vijayawada talks about what could cause a cancer lump in the armpit and how to tell if a lump in the armpit is cancerous. Understanding the symptoms of the cancer lump under the armpit and the different treatment methods can help you take timely action for better outcomes.
Synopsis
What Exactly Is a Lump Under the Armpit?
A lump under the armpit is a swelling or unusual growth in the axillary area. The lymph nodes in the armpit or axilla are important for the immune system, and if these lymph nodes get too big or change shape, they can potentially form a lump. In many cases, armpit lumps occur due to infections or benign conditions. However, persistent swelling may raise concern about a cancer lump under the armpit.
Lumps can be of different sizes, shapes, and levels of softness. Some conditions can appear suddenly, while others worsen gradually. In some cases, changes in the armpit may reflect underlying conditions elsewhere in the body, as lymph nodes play a key role in immune defence.
Common Causes of Armpit Lumps
Several everyday conditions can lead to swelling in the underarm. Not all of these conditions are harmful, but a healthcare professional should check out lumps that persist or increase in size. The following are some of the causes you may notice armpit lumps:
-
Swollen Lymph Nodes: The lymph nodes swell up when the body is fighting an infection. Viral and bacterial infections or other inflammatory conditions can cause temporary swelling. Although swollen nodes are often harmless, persistent enlargement may raise suspicion of a cancer lump in the armpit if other warning signs are present.
-
Infections: Skin infections or abscesses may lead to painful lumps in the armpit. These lumps are usually red, tender, and warm to the touch.
-
Lipomas: Lipomas are soft, benign fatty lumps that develop under the skin. They are usually painless and slow-growing.
-
Cysts: Blocked sweat glands or hair follicles can form cysts in the armpit region.
-
Cancer: In some cases, a lump under the armpit may appear when cancer spreads to nearby lymph nodes. Breast cancer is a common cause of this.
Understanding these possibilities helps clarify why doctors investigate whether lumps under the armpit can be cancerous.
Cancer Lump Under Armpit Symptoms
Recognising cancer lump under the armpit symptoms can help detect cancer at an earlier stage. These symptoms can vary, of course, depending on the specific cancer and how advanced it is. The common symptoms include:
A lump that doesn't disappear after a few weeks, especially one under the armpit, is a frequent red flag. Unlike the swelling you might get from an infection, this lump might remain the same size or even grow.
-
A cancerous lump in the armpit is often hard and may feel as if it's stuck to the tissues around it, rather than shifting easily beneath the skin.
-
Many people delay seeing a doctor because these lumps are often painless at first.
-
Changes to the skin, like redness, thickening, or dimpling, may happen near the lymph nodes that are affected.
-
In some cases, a cancer lump under the armpit may be associated with breast cancer. Patients may see a lump in the breast, nipple discharge, or changes in breast shape.
Additionally, associated symptoms like fever, night sweats, or unexplained fatigue may provide clues about the underlying cause.
Can Lumps Under the Armpit Be Cancerous?
Understanding the possible reasons for a lump helps answer the common question: Can a lump under the armpit be cancerous? Many lumps are not cancerous.
Cancer-related lumps may occur due to:
-
The spread of breast cancer to nearby lymph nodes
-
Lymphoma, which affects the lymphatic system
-
Cancer that has spread from other parts of the body
Additionally, a few clear differences lie in benign and cancerous lumps. While these are not certain indicators of a benign or cancerous lump, they can help you make decisions without getting alarmed right away.
The following characteristics can help differentiate between benign and potentially serious lumps:
|
Feature of the Lump |
Benign Lump |
Cancerous Lump |
|
Pain |
Often painful |
Usually painless |
|
Mobility |
Moves easily |
Fixed |
|
Growth |
Slow |
Progressive |
|
Texture |
Soft |
Hard |
Certain factors can increase the risk of a cancerous lump in the armpit. These include:
-
A family history of breast or lymphatic cancers
-
Increasing age
-
A previous history of cancer
-
Lifestyle and hormonal factors, such as obesity or smoking
While these risks do not always mean cancer is present, they help doctors assess the likelihood during evaluation. Early detection plays a key role in ensuring timely diagnosis and appropriate treatment.
Cancer Lump in Armpit Diagnosis
When a persistent lump is detected, doctors perform detailed examinations to confirm the cause. Accurate diagnosis involves several medical tests.
-
Physical Examination - Doctors evaluate the size, texture, and mobility of the lump during clinical examination.
-
Imaging Tests - Imaging tests help doctors understand where the lump is coming from and whether it appears solid, fluid-filled, or suspicious in nature. Common imaging tests include:
-
Ultrasound
-
Mammography
-
CT scans
-
MRI scans
-
These tests help identify the nature and cause of the lump.
-
Biopsy - If something unusual shows up on imaging, a biopsy may be needed. In this test, a small sample of tissue is taken and checked under a microscope. A biopsy is the most definitive way to check whether the lump under the arm is cancerous.
-
Blood Tests - Blood tests may help identify infections or assess overall health, but they are not used alone to diagnose most cancers. As such, it is ideal to do blood tests along with other forms of diagnosis to confirm the nature of the lump.
Treatment Options for Cancer Lump Under the Armpit
Treatment depends on the underlying cause identified during diagnosis.
-
Surgical Treatment: It may be performed to remove cancerous lymph nodes or tumours.
-
Chemotherapy: It utilises drugs to destroy cancer cells that may have spread beyond the primary tumour.
-
Radiation Therapy: High-energy beams are used in radiation therapy to kill cancer cells.
-
Targeted Therapy and Immunotherapy: These treatments target specific mechanisms in cancer cells and may be applicable to particular cancer types.
Early identification of cancer lump under the armpit symptoms enables doctors to suggest the most appropriate treatment plan.
When Should You See a Doctor?
Medical consultation is recommended if:
-
A lump persists for more than 2-4 weeks.
-
The lump continues growing
-
The lump is hard or painless.
-
Skin changes appear near the lump.
-
Other symptoms, such as unexplained weight loss, occur.
Prompt evaluation helps rule out serious conditions such as a cancer lump under the armpit and ensures appropriate treatment.
Conclusion
A lump under the armpit can have several causes, ranging from infections to serious medical conditions. While many lumps are harmless, persistent swelling may indicate a cancerous lump under the armpit linked to lymph node involvement. Recognising cancer lump under the armpit symptoms and understanding that lumps under the armpit can be cancerous is an important step toward early diagnosis. Medical tests such as imaging and biopsy help confirm the cause and guide treatment decisions.
For expert evaluation and accurate diagnosis in Vijayawada, consult the oncology specialists at Manipal Hospital Vijayawada for comprehensive cancer care and personalised treatment plans.
FAQ's
Yes, many armpit lumps caused by infections, irritation, or inflammation can resolve on their own within a few days to weeks. However, if the lump persists, grows, or keeps returning, it should be evaluated by a doctor.
Pain is more commonly associated with infections or inflammatory conditions rather than cancer. Still, the absence or presence of pain alone cannot confirm the cause, so persistent lumps should always be checked.
Yes, shaving can lead to ingrown hairs or minor skin infections, while deodorants may sometimes irritate the skin or block sweat glands. These usually cause small, temporary lumps that settle once the irritation improves.
There is no fixed size that determines risk, as even small lumps can sometimes be significant. Any lump that increases in size, feels hard, or does not go away over time should be examined.
Yes, men can develop armpit lumps due to cancers such as lymphoma or, more rarely, male breast cancer. While less common, any persistent or unusual lump in men should also be evaluated promptly.
Share this article on:
