An underarm lump does not necessarily mean breast cancer. Benign conditions cause most underarm lumps, but because breast cancer can sometimes involve the lymph nodes in the armpit, a persistent or unexplained lump should be evaluated by a doctor.
However, there is a connection between the breast and the lymph nodes in the armpit. Because of this connection, breast cancer can sometimes affect the lymph nodes under the arm. This is why a new, persistent, or unexplained underarm lump should be properly evaluated rather than ignored.
Does Breast Cancer Have a Connection to Underarm Lump?
Yes, breast cancer and an underarm lump can sometimes be connected. The upper outer part of the breast is a common location for breast tumours, and this area is close to the armpit, where several lymph nodes are located. Breast cancer can develop in different areas of the breast and, in some cases, may involve nearby axillary lymph nodes.
Finding a lump in your breast or underarm can naturally cause concern, whether you noticed it accidentally or while doing a breast self-examination. A new breast lump can sometimes be an early sign of breast cancer, but most breast lumps are not cancerous.
If your doctor recommends a biopsy, feeling anxious about the result is completely understandable. However, patient information from breast-health organizations commonly notes that around 80% of breast biopsies in women have benign, or non-cancerous, results. So, being advised to have a biopsy does not mean that you have cancer. The purpose of the biopsy is to find out exactly what the lump is.
How Do You Know a Lump is Cancerous?
You cannot reliably determine whether an underarm lump is cancerous simply by touching it. Some concerning lumps may feel firm, irregular or less mobile, but these characteristics alone cannot confirm cancer.
A lump deserves medical attention if it:
- Remains present for an extended period
- Continues to increase in size
- Feels unusually firm
- Does not have an obvious cause
- Occurs along with a breast lump
- Is associated with breast or nipple changes
- Keeps returning after appearing to settle
- Is accompanied by swelling around the breast or collarbone
A cancerous lymph node may sometimes be firm and painless, but this is not always the case. Similarly, lymph nodes enlarged because of infection can also feel firm or swollen.
This is why you should not try to diagnose a cancerous lump based only on how it feels. A doctor may need to examine the area and recommend imaging or other tests to determine the cause.
Additional Signs
An underarm lump may occur with other breast changes, although some women with breast cancer may have very few noticeable symptoms.
Other signs that should be evaluated include:
- A new lump in the breast or underarm
- Swelling in the breast, armpit or around the collarbone
- A change in the size or shape of one breast
- Dimpling or pulling in of the breast skin
- Skin that becomes thickened or develops an orange-peel-like appearance
- Persistent redness or unusual skin changes
- Dry, scaly or irritated-looking skin around the breast or nipple
- A newly inverted nipple
- Unusual nipple discharge, particularly bloody discharge
- Persistent swelling of part or all of the breast
- A noticeable change in the appearance of the breast
- Persistent breast discomfort or pain
Having one or more of these symptoms does not automatically mean breast cancer. Many breast changes can occur because of benign breast conditions, hormonal changes, infections or other causes.
However, if a change is new, persistent or unusual for you, it is better to have it checked rather than trying to determine the cause yourself.
If breast cancer has spread beyond the breast and nearby lymph nodes, symptoms can vary depending on where it has spread. For example, some people may experience unexplained weight loss, persistent bone pain, or breathing difficulties.
These symptoms can also occur because of conditions unrelated to cancer, so they should never be considered proof of advanced breast cancer on their own.
What is the Size of the Cancerous Lump?
There is no particular size that can tell you whether an underarm or breast lump is cancerous.
A cancerous tumour can be small when it is detected, while some benign conditions can produce a larger lump. Therefore, the size of a lump alone cannot determine whether it is dangerous.
Doctors consider several factors when assessing a lump, such as:
- How long it has been present
- Whether it is becoming larger
- Its consistency and appearance
- Whether it is painful or tender
- Whether it feels mobile or fixed
- Whether other lymph nodes are enlarged
- Whether there are changes in the breast or nipple
- What the physical examination and imaging show
For this reason, you should not wait for a lump to reach a certain size before getting it checked.
Does Deodorants Cause Lumps?
Deodorants and antiperspirants are not established causes of breast cancer. However, products used on the underarm skin can sometimes cause irritation or an allergic reaction in certain people.
There are several other common reasons why a lump or bump may appear under the arm.
For example, shaving can sometimes cause an ingrown hair or irritated hair follicle. This may result in a small, red or painful bump.
A skin infection can also cause a tender swelling or abscess. In some cases, conditions such as hidradenitis suppurativa can lead to recurring painful lumps in the armpit.
These conditions are different from breast cancer and usually require a different type of treatment.
Therefore, if you notice an underarm lump, do not automatically assume that it is caused by deodorant or that it is related to breast cancer. The cause should be identified through proper evaluation.
When Should You Consult a Doctor?
You should consult a doctor if you discover a new, persistent or unexplained lump under your arm.
It is especially important to seek medical advice if:
- The lump continues to grow
- It does not go away
- It feels unusually firm
- You notice a lump in your breast
- Your breast changes in size or shape
- You notice skin dimpling or thickening
- Your nipple becomes newly inverted
- You notice unusual nipple discharge
- The swelling keeps coming back
- You have no obvious explanation for the lump
- The lump remains after an infection or skin problem has improved
A doctor may examine both breasts, the underarm area and nearby lymph nodes. Depending on your symptoms and examination findings, further tests may be recommended.
Remember, seeing a doctor does not mean that you have cancer. Many underarm lumps turn out to have a benign explanation. Medical evaluation simply helps you understand what is actually causing the swelling.
How is an Underarm Lump Diagnosed?
When you visit a doctor with an underarm lump, the evaluation generally begins with a clinical examination.
Your doctor may examine both breasts, both armpits and nearby lymph node areas. They may also ask when you first noticed the lump, whether it has changed in size, whether it is painful and whether you recently had an infection, skin irritation or injury.
Ultrasound
An ultrasound can help examine the structure of a lump and may help distinguish an enlarged lymph node from other types of soft-tissue abnormalities.
Mammogram
Depending on your age, symptoms and clinical findings, a diagnostic mammogram may be recommended to look for changes within the breast.
Biopsy
If an examination or imaging test identifies an area that needs further assessment, your doctor may recommend a biopsy.
During a biopsy, a small sample of tissue is collected and examined under a microscope.
Being advised to have a biopsy does not mean that you definitely have cancer. It means that the doctor needs more information to make an accurate diagnosis.
What If the Underarm Lump Is a Swollen Lymph Node?
The armpit contains many lymph nodes that are part of the body’s immune system. These nodes help the body respond to infections and other conditions.
A lymph node may become enlarged when the body is fighting an infection or inflammation. For example, infections affecting the skin, arm or breast can sometimes cause nearby lymph nodes to swell.
Breast cancer can also involve the axillary lymph nodes. However, an enlarged lymph node does not automatically mean that breast cancer has spread.
Doctors consider the complete clinical picture, including the breast examination, characteristics of the lymph node and imaging findings. If necessary, a biopsy may be performed to determine what is causing the enlargement.
Can an Underarm Lump Be the First Sign of Breast Cancer?
Yes, in some cases, an enlarged lymph node under the arm can be the first noticeable sign of breast cancer.
Breast cancer cells can sometimes travel through the lymphatic system and reach nearby axillary lymph nodes. As a result, a woman may notice swelling in the armpit even before she identifies a definite lump in the breast.
However, this does not mean that every underarm lump represents breast cancer.
Infections, inflammation, cysts, skin conditions, and other benign causes can also enlarge lymph nodes or produce underarm lumps.
If you notice a persistent or unexplained lump, getting it evaluated is the best way to determine its cause.
Why Choose Dr. Farah Arshad for Breast Care in Lucknow?
When you notice a breast or underarm change, consulting a doctor with focused experience in breast conditions can help ensure that the problem is evaluated appropriately.
Dr. Farah Arshad is a breast-focused surgeon who provides evaluation and management of breast cancer as well as a range of benign breast conditions. Her professional background includes training in breast and endocrine surgery, along with experience in breast cancer surgery and oncoplastic breast procedures.
For women looking for a female breast doctor in Lucknow, a focused breast consultation can help identify whether an underarm lump requires further investigation.
The goal of a breast evaluation is not simply to look for cancer. It is also to identify benign conditions, understand the cause of symptoms and recommend an appropriate treatment or follow-up plan based on the individual patient.
Frequently Asked Questions
Q.Is an underarm lump always a sign of breast cancer?
No. An underarm lump can occur because of swollen lymph nodes, infections, cysts, ingrown hairs, skin conditions and other benign causes. However, a persistent or unexplained lump should be evaluated by a doctor.
Q.Can breast cancer cause a lump under the arm?
Yes. Breast cancer can sometimes involve the axillary lymph nodes and cause swelling or a lump under the arm. However, an underarm lump by itself cannot confirm breast cancer.
Q.Can a painful underarm lump be cancer?
Pain alone cannot determine whether a lump is cancerous. Many infections and inflammatory conditions cause painful lumps, but persistent or unusual swelling should still be checked.
Q.Can breast cancer cause swollen lymph nodes without a breast lump?
Yes. In some cases, an enlarged axillary lymph node may be noticed before a woman feels a definite breast lump. This is one reason unexplained underarm swelling should be evaluated.
Q.What does a cancerous lymph node feel like?
A cancerous lymph node may sometimes feel firm or less mobile, but these features are not enough to diagnose cancer. A clinical examination and appropriate testing are needed.
Q.Can shaving cause a lump under the arm?
Yes. Shaving can cause skin irritation, folliculitis or an ingrown hair, which may appear as a small or painful underarm lump.
Q.Can deodorant cause breast cancer?
There is no established evidence that routine deodorant or antiperspirant use causes breast cancer. Some products can, however, irritate the skin or cause an allergic reaction.
Conclusion
Finding a lump under your arm can understandably raise concerns about breast cancer. However, an underarm lump does not automatically mean that you have breast cancer. Swollen lymph nodes, infections, cysts, ingrown hairs and several other benign conditions can also cause lumps in the armpit.
At the same time, the breast and axillary lymph nodes are closely connected, and breast cancer can sometimes involve lymph nodes under the arm. This is why a new, persistent, growing or unexplained lump should not be ignored.
Do not try to decide whether a lump is cancerous based only on its size, pain or texture. A proper clinical examination, followed by imaging or a biopsy when necessary, can provide a much more reliable answer.
If you have noticed a new breast or underarm lump and are looking for a breast cancer specialist in Lucknow,can evaluate your symptoms and guide you toward the appropriate next step.
