Breast Lump: Causes, Symptoms, and Treatment
Medically reviewed by Achuta Uppu, MD, Internal Medicine. Last reviewed: October 23, 2026.
What kind of doctor treats Breast Lump?
A primary care doctor, gynecologist (a women's health doctor), or breast specialist usually checks a breast lump first. A breast surgeon treats lumps that need surgery. A direct primary care or concierge doctor can be a first stop for an evaluation and can refer you to a specialist when needed.
What is a breast lump?
A breast lump is any bump or firm area in the breast or under the arm. Many benign (not cancer) conditions can cause lumps or lumpiness in the breast. Most breast changes are benign. Some conditions, however, are precancerous, which means they are not cancer but may become cancer. That is why every new lump needs a doctor's check.
Common causes include breast cysts, closed, saclike pockets of tissue, most often filled with fluid. Fibroadenomas are benign tumors that often feel like hard, round lumps and move easily. Fibrocystic breast changes cause swelling, discomfort, and lumpiness. Intraductal papillomas are wartlike growths in a milk duct. Infection (mastitis) can also make the breast feel lumpy.
Symptoms
Symptoms depend on the cause. Benign breast disease may cause no symptoms at all, or it may include:
- A lump or firm feeling in your breast or under your arm.
- A change in the size or shape of your breast.
- Nipple discharge, or fluid that is not breast milk.
- Skin changes such as itching, redness or darkening, dimples, scaling, or puckering.
- Painful, swollen, or tender breasts, often just before your period.
Breast cancer does not usually cause pain. Cysts and hormone changes before your period often do.
Causes and who gets it
Age, hormone levels, and medicines can cause lumps, bumps, and fluid discharge. Cysts are most common in premenopausal women. Fibrocystic changes are most common in women under age 45, and as many as half of all women notice them. Fibroadenomas are the most common benign breast tumors in women under age 30, though they can be found at any age. Breast duct ectasia, widened and thickened ducts, is most common near or after menopause.
A lump can also be a sign of breast cancer, and early breast cancer often has no symptoms, which is why screening matters.
How doctors diagnose it
The doctor takes your history and does a physical exam. Some lumps are felt during a clinical breast exam. Others show up on a screening mammogram, an X-ray picture of the breast, or on an ultrasound or MRI. The doctor may also recommend a breast biopsy, which removes a small sample of tissue to check for cancer.
Treatment
Treatment depends on the type of breast disease. Some breast changes go away without treatment. Others need monitoring, biopsy, or surgery. Benign lumps are often watched with follow-up exams. Conditions that raise cancer risk may need more frequent exams, imaging, or medicines to lower the risk.
When to see a doctor
Contact a doctor right away if you notice any change in your breasts, including a lump, pain, discharge, or skin irritation. Minor and serious breast problems can have similar symptoms. Go promptly if a lump in or near the breast or under the arm feels hard and fixed, or if the nipple flattens or turns inward, or the skin puckers, since these can be signs of cancer. Follow up even if you had a recent normal mammogram.
How a direct primary care or concierge doctor fits in
A direct primary care doctor charges a flat monthly fee instead of billing insurance, while a concierge doctor usually charges more and often works alongside insurance. Either can examine a new breast lump quickly, order imaging, and refer you to a breast specialist. They can also follow up with you over time while a benign lump is watched.
Common questions
Are most breast lumps cancer?
No. Most breast changes are not cancer. Many benign conditions, such as cysts, fibroadenomas, and fibrocystic changes, cause lumps. Still, every new lump should be checked by a doctor.
What does a fibroadenoma feel like?
It often feels like a hard, round lump that moves easily when pushed. Fibroadenomas are solid, round, and rubbery. They usually do not hurt, and they can grow larger when estrogen levels rise, such as in pregnancy.
Do cysts hurt?
They can. Cysts are fluid-filled lumps that may be tender, and they may hurt just before your menstrual period begins. Many cysts are too small to be felt.
Does breast pain mean cancer?
Usually not. Breast cancer does not usually cause pain. Cysts and hormone changes before your period often cause soreness, and some medicines can too. But if breast pain persists, see a doctor.
Sources
- National Cancer Institute - Benign and Precancerous Breast Lumps and Conditions
- National Cancer Institute - Signs and Symptoms of Breast Cancer
- MedlinePlus - Breast Diseases
Medical Disclaimer
This content is for general educational and informational purposes only and is not medical advice. It is not a substitute for professional medical advice, diagnosis, or treatment, and reading it does not create a doctor-patient relationship. Always seek the advice of your physician or another qualified health provider with any questions about a medical condition, and never disregard or delay seeking professional advice because of something you read here. If you think you may have a medical emergency, call 911 (or your local emergency number) immediately.
