Armpit Lump: Lump Meaning, Causes, Symptoms, and Diagnosis

Lump meaning: A lump in the armpit is a common problem, and it can be due to swollen lymph node under the armpit. However, there might be various reasons for a lump in the armpit, and some may require instant treatment.

Depending upon the cause, there will be available treatment options. A doctor can identify the cause of armpit lumps and suggest proper medications.

Causes of Lump in Armpit

Mostly, lumps are not harmful, and they usually develop because of abnormal tissue growth. But, some armpit lump can cause a serious health problem. If you have an unusual lump in the armpit, then you should get proper treatment for this.

The most common causes of a lump in the armpit are:

  • Lipomas (harmless, start with fat tissue growth)
  • Viral or bacterial infections
  • Allergic reactions
  • Fungal infections
  • Hidradenitis suppurativa
  • Breast cancer
  • Lymphoma
  • Leukemia (blood cell cancer)
  • A fibroadenoma
  • Systematic lupus erythematosus

Symptoms of Armpit Lump

The lump itself is the main symptom of an armpit lump. The lumps can be small or large. Armpit lump texture may differ according to what is the reason for it. For instance, fatty growth or a cyst infection may feel soft when you touch it. On the other hand, cancerous and fibroadenomas tumors may feel hard when you touch them.

Some people experience a painful lump in armpit. Sometimes, when there are infections and allergic infections, then it can cause softer lumps, but it might be possible that feel pain in underarm. A lump caused by a lymph node can also cause pain in the armpit.

The infections can cause the symptoms that are written below:

  • Fever
  • Swelling overall lymph nodes in the body
  • Night sweats

If lumps don’t go away easily, then they can cause serious conditions such as:

  • Lymphoma
  • Breast cancer
  • Leukemia

Some people may also suffer from armpit rash that might be due to allergens, autoimmune system, infections, or other causes such as stress.

When to Worry About a Lump under Skin?

If the painful lump in armpit doesn’t go away, then you must seek medical help. Some lumps can lead to serious health problems as mentioned above. If a lump grows and goes away easily over time, then it will cause no harm to you because it might be an inflamed cyst.

The following are some symptoms of a lump that might need attention:

  • If lump becomes hard under the skin
  • If the lump grows rapidly
  • If the lump begins bleeding or becomes a wound

If the painful lump in armpit shows the above symptoms, then you must seek help from your doctor. Similarly, you can even go for a check-up without any delay if the lump grows rapidly.


Once you get that lump is becoming serious for you, and then you can go for a medical check-up. Your doctor will examine the lump by reviewing the patient’s medical history. During your physical examination, they might pinch or squeeze the lump.

The doctor may ask you about a lump that how long it has been present. And, whether the lump has changed its size or not. If the lump gets irritated or abnormal, then it might need further testing. Tests may include:

  • Imaging Test: Doctors may use CT scans, MRIs, ultrasound, and X-rays.
  • A Blood Test: It might be possible that your doctor suggests a blood test to check the patient’s white blood cell count or if there is a hormonal imbalance.
  • A Needle Biopsy: During a biopsy, the doctor may remove a small sample of tissue from inside the lump for a check-up.

How do you feel, if it is a cancer lump?

The shape of normal lymph will look like a lima bean. The symptom of a cancer lump is that it will become hard. If it is a cancer lump, then it will change its shape from lima bean and become hard. If a swollen lymph node is not shaped like a lima bean, then it might be possible that it can be cancerous.

If the lump is not in your skin and it gets larger, and it is not showing the sign of infections, then you might need to seek help.

Can a painful lump be cancer?

When you have a lump in the armpit, then your armpit pain may increase, but if a lump is painful or sensitive, then there might be another cause. Infection and inflammation can cause pain in underarm, but a cancer lump is less likely to be painful. A lump under the armpit might be concerning if it is painless.

No matter what the symptoms of the lump, if it doesn’t resolve over time, then you need to get a consultation from your doctor.

Read about “Frozen Blueberries: Nutrition Facts, Benefits and Side Effects.


The condition of the lump will depend on the cause. For instance, if a lump grows from a viral infection, then it will go away on its own. However, on the other hand, if there is a painless lump and doesn’t go away, then you might need medical help. When it comes to armpit fat, then it can be due to excess weight, but genetics and hormones also play an important role.

The armpit lump caused by cancer will depend on a variety of aspects, including cancer stage and whether the tumors have spread to other body parts. To cure this problem, it is suggested to get help from your doctor.

Previous Post
Next Post

Leave a Reply

Your email address will not be published. Required fields are marked *

Translate »