A breast lump may appear near the surface of the skin, deeper inside the breast tissue, or closer to the armpit area.
People should see their doctor for any changes or lumps they find in their breast.
This article looks at what breast lumps might mean and the different types that can occur. We also discuss how to check for lumps and when to see a doctor.
If someone finds a lump in their left breast, they should remain calm. The first step is to work out the characteristics of the lump and look for any other breast changes.
Breast tissue is naturally lumpy, and its textures change with hormones and aging processes. Compare the size, appearance, and texture of both breasts. Evenly dispersed lumps in both breasts usually indicate normal, healthy breast tissue.
Lumps that differ from the surrounding breast tissue may suggest a tumor, which could be cancerous or noncancerous, or another breast condition.
The signs of breast cancer are different for different women. The most common signs are changes in the look or feel of the breast or nipple and nipple discharge.
Look out for the following warning signs of breast cancer:
The sections below discuss several types of breast lump and how to identify them.
The majority of breast lumps are not cancerous. A person may develop one of the following benign breast lumps:
Fibroadenoma is the most common type of noncancerous tumor that affects the breast.
A fibroadenoma is a tumor made up of glandular and connective tissues. They feel like a small, round marble in the breast.
Fibroadenomas also have the following characteristics:
It is possible to have more than one fibroadenoma. According to the American Cancer Society (ACS), having a fibroadenoma can slightly increase a person’s risk of breast cancer.
Not all fibroadenomas require treatment. Some will shrink or even disappear on their own. A doctor will usually recommend removing the fibroadenoma if it grows or causes changes within the breast.
Breast cysts mainly affect women in their 40s, but people can develop breast cysts at any age.
Symptoms of breast cysts include:
Doctors use ultrasound tests to diagnose breast cysts. Cysts that contain only fluid do not need treatment unless they are very large or cause discomfort.
If the cyst appears solid or has solid areas on the ultrasound image, the doctor may recommend a biopsy to rule out breast cancer.
Fibrocystic breast changes occur when hormonal changes during menstruation cause lumpiness in one or both breasts.
Fibrocystic breast changes happen over time and over repeated menstrual cycles. They can cause some discomfort, but they do not increase the risk of breast cancer.
Other symptoms of fibrocystic breast changes include:
Fibrocystic breast changes do not require medical treatment. Taking over-the-counter (OTC) pain relievers and using warm compresses can help relieve uncomfortable or painful symptoms.
Although fibrocystic breast changes are often harmless, they can make detecting breast cancer through breast self-examinations more difficult. This is why it is essential for people to get screened for breast cancer regularly.
An intraductal papilloma is a noncancerous tumor that develops in the milk ducts of the breast. These growths are a common cause of nipple discharge.
People can have one near the nipple, or a cluster of small tumors in the narrow milk ducts farther from the nipple.
Symptoms of intraductal papilloma include:
Having one intraductal papilloma does not affect a person’s risk of breast cancer, but having several can increase the risk slightly.
Doctors may treat intraductal papillomas by surgically removing the papilloma along with the affected area of the milk duct.
A lipoma is a collection of fat cells. They can develop anywhere on the body. Lipomas usually appear just below the skin, but they can also form inside the mammary glands.
Lipomas are soft, moveable lumps that do not cause pain. A lump is usually the only symptom. Lipomas in the breast do not increase the risk of breast cancer.
Mastitis is an infection in the breast tissue.
A blocked milk duct or bacteria entering the breast can cause a breast infection. This may be more common while breastfeeding.
Symptoms of mastitis include:
Treatments for mastitis include taking antibiotics and OTC pain relievers. Untreated mastitis can develop into a collection of pus, or an abscess, in the breast tissue. If an abscess forms, a person may need surgery to drain the pus.
Adenosis is a noncancerous breast condition characterized by abnormally large lobules in the breast. Adenosis can cause a lump that feels similar to a cyst or a tumor.
The enlarged lobules can contain calcium deposits, which makes it difficult for a doctor to tell them apart from tumors on a mammogram.
A doctor will use a biopsy to determine if the lump is adenosis or breast cancer. There is some debate around whether or not adenosis increases the risk of developing breast cancer or not.
Biopsies are minimally invasive procedures. Before a biopsy, a medical professional will give the person a local anesthetic. During the procedure, they will use a thin needle to remove a small sample of tissue for laboratory testing.
People who have adenosis do not need treatment, but they can get regular checkups to watch out for warning signs of breast cancer.
Some phyllodes tumors are borderline, meaning that they fall between benign and malignant.
Phyllodes tumors feel like hard, painless masses. A doctor will usually perform a biopsy to diagnose these tumors because they are difficult to identify using mammograms and ultrasounds.
Surgery is the main treatment for phyllodes tumors. People who have had phyllodes tumors removed will need regular follow-ups and breast exams, as these tumors can return after treatment.
Breast cancer is a collection of abnormal cells that develop in the tissue, ducts, or lobules of the breast. Breast cancer cells divide and multiply rapidly to form tumors that starve the surrounding tissue.
Breast cancer tumors are usually hard, irregular in shape, and painless.
Early diagnosis of breast cancer is vitally important. Some people can develop breast cancer symptoms before they notice a lump in the breast.
Some of these symptoms include:
To assess a breast lump, a healthcare professional will review a person’s medical history and perform a physical examination of the breast. They may then use imaging tests to see if the lump is benign or cancerous.
Such tests may include the following:
People who have a very high risk of developing breast cancer can have screening MRI scans.
If a doctor is still unsure about the nature of a breast lump after performing imaging tests, they may recommend a biopsy to determine if the lump is benign or cancerous.
While most breast lumps are benign, people should have a healthcare professional check any new or unusual breast lumps.
It is especially important for people to seek medical attention if they have a breast lump and any of the following warning symptoms of breast cancer:
Most breast lumps are benign. If a person finds a lump in either breast or both, they should try to stay calm and schedule an appointment so that a doctor can look at it.
Regular breast screening, such as self-breast examinations and mammograms, play a vital role in the early detection of breast cancer.
The ACS state that women aged 45–54 years should have annual mammograms.
All breasts are different, so what might be normal for one person may not be for another. People should try to become familiar with their breasts, so that they can inform their doctor of any changes.