{"id":52734,"date":"2025-04-25T22:08:12","date_gmt":"2025-04-26T02:08:12","guid":{"rendered":"https:\/\/www.hancockhealth.org\/mayo-health-library\/breast-lumps\/"},"modified":"2026-02-04T12:11:43","modified_gmt":"2026-02-04T17:11:43","slug":"breast-lumps","status":"publish","type":"mayo","link":"https:\/\/hancockhealth.apgar.digital\/ja\/mayo-health-library\/breast-lumps\/","title":{"rendered":"Breast lumps"},"content":{"rendered":"<div class=\"container mx-auto   wordpress-block wordpress- core-\">\n<p>A breast lump is a growth that forms within the breast. Different types of breast lumps can vary in the way they look and feel.<\/p>\n<p>You might notice:<\/p>\n<ul>\n<li>A distinct lump with clear-cut edges.<\/li>\n<li>A firm or hard area within the breast.<\/li>\n<li>A thicker, slightly raised area in the breast that&#8217;s different from the tissue around it.<\/li>\n<\/ul>\n<p>You also might see these changes along with a lump:<\/p>\n<ul>\n<li>An area of skin that has changed in color or turned red or pink.<\/li>\n<li>Dimpling of the skin.<\/li>\n<li>Pitting of the skin, which may look like an orange peel in texture.<\/li>\n<li>A change in the size of one breast that makes it larger than the other breast.<\/li>\n<li>Nipple changes, such as a nipple that turns inward or releases fluid.<\/li>\n<li>Lasting breast pain or tenderness, which is in one area or may go on after your period.<\/li>\n<\/ul>\n<p>A breast lump can be a sign of breast cancer. That&#8217;s why you should get it checked by your health care provider as soon as you can. It&#8217;s even more important to get a breast lump checked after menopause. The upside is that most breast lumps are benign. That means they are not caused by cancer.<\/p>\n<p>Breast lumps can be caused by:<\/p>\n<ul>\n<li>Breast cancer <\/li>\n<li>Breast cysts (which are fluid-filled sacs in breast tissue that are not cancer. The fluid in a cyst looks like water. An imaging test called ultrasound is used to find out if a breast lump is a cyst.)<\/li>\n<li>Fibroadenoma (a solid, benign growth within the breast glands. It is a common type of breast lump.)<\/li>\n<li>Fibrocystic breasts <\/li>\n<li>Intraductal papilloma.<\/li>\n<li>Lipoma (a slow-growing lump involving fatty breast tissue. It can feel doughy, and it is often harmless.)<\/li>\n<li>Trauma to the breast from a bump, breast surgery or other reasons.<\/li>\n<\/ul>\n<p>Breast lumps also can be caused by health problems that can happen during breastfeeding, such as:<\/p>\n<ul>\n<li>Mastitis (an infection in breast tissue)<\/li>\n<li>A milk-filled cyst that&#8217;s usually harmless.<\/li>\n<\/ul>\n<p>Make an appointment to have a breast lump checked, especially if:<\/p>\n<ul>\n<li>The lump is new and feels firm or fixed.<\/li>\n<li>The lump doesn&#8217;t go away after 4 to 6 weeks. Or it has changed in size or in how it feels.<\/li>\n<li>You notice skin changes on your breast such as crusting, dimpling, puckering, or a change in color, including red and pink.<\/li>\n<li>Fluid comes out of the nipple. It might be bloody.<\/li>\n<li>The nipple recently turned inward.<\/li>\n<li>There is a new lump in the armpit, or a lump in the armpit seems to be getting bigger.<\/li>\n<\/ul>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>A breast lump could be due to something harmless. Or it could be cancer. Learn breast lump causes and find out when you need to see a health care provider.<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","template":"","tags":[1686,1685,1682],"class_list":["post-52734","mayo","type-mayo","status-publish","hentry","tag-anatomical-structure","tag-condition","tag-person-group-concept","content_type-symptoms"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Breast lumps - Hancock Health<\/title>\n<meta name=\"robots\" content=\"noindex, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Breast lumps - Hancock Health\" \/>\n<meta property=\"og:description\" content=\"A breast lump could be due to something harmless. Or it could be cancer. 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