Breast Lump
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Reviewed By:
Yoshinori Abe, MD (Internal medicine)
Dr. Abe graduated from The University of Tokyo School of Medicine in 2015. He completed his residency at the Tokyo Metropolitan Health and Longevity Medical Center. He co-founded Ubie, Inc. in May 2017, where he currently serves as CEO & product owner at Ubie. Since December 2019, he has been a member of the Special Committee for Activation of Research in Emergency AI of the Japanese Association for Acute Medicine. | | Dr. Abe has been elected in the 2020 Forbes 30 Under 30 Asia Healthcare & Science category.
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Content updated on Jan 4, 2023
About the symptom
A breast lump is a mass that develops in the breast. They may be hard or soft, smooth or lumpy and come in all shapes and sizes.
When to see a doctor
Seek professional care if you experience any of the following symptoms
Erythema
Headache
Fever
Recent weight loss
Swelling of the affected area
Possible causes
- Epidermoid cyst
Also called sebaceous cysts, these harmless bumps under the skin are more common in men. They can be caused by skin irritation, injury, or surgery.
- Breast cancer
Breast cancer. Risk factors include estrogen, genetics, alcohol, and obesity. Protective factors include pregnancy, especially at a younger age.
- Gynecomastia
A condition in which abnormal hormone levels cause males to develop female characteristics, such as breast enlargement. Common causes include medications and brain tumors.
- Premenstrual syndrome (PMS)
- Mastopathy
- Mastitis
- Traumatic fat necrosis
- Mondor disease
- Malignant lymphoma
- Testicular tumor
Questions your doctor may ask about this symptom
Your doctor may ask these questions to check for this symptom
Do you feel a lump in your breast?
Do you have any swelling in any part of your body?
Do you feel fatigued?
Is there pain when pressing on the breast?
Is there blood mixed with the breast milk? (If you are not breastfeeding, please skip this question)
Other Related Symptoms
Similar symptoms or complaints
Symptoms from the same body system / part
Symptoms treated by the same specialty
References
Perry MC. Breast Lump. In: Walker HK, Hall WD, Hurst JW, editors. Clinical Methods: The History, Physical, and Laboratory Examinations. 3rd ed. Boston: Butterworths; 1990. Chapter 170. PMID: 21250122.
https://www.ncbi.nlm.nih.gov/books/NBK279/
Breast lumps
https://www.nhs.uk/conditions/breast-lump/
Reviewed By:
Yoshinori Abe, MD (Internal medicine)
Dr. Abe graduated from The University of Tokyo School of Medicine in 2015. He completed his residency at the Tokyo Metropolitan Health and Longevity Medical Center. He co-founded Ubie, Inc. in May 2017, where he currently serves as CEO & product owner at Ubie. Since December 2019, he has been a member of the Special Committee for Activation of Research in Emergency AI of the Japanese Association for Acute Medicine. | | Dr. Abe has been elected in the 2020 Forbes 30 Under 30 Asia Healthcare & Science category.
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Seiji Kanazawa, MD, PHD
Obstetrics and gynecology (OBGYN)
National Center for Child Health and Development, Japan