A new lump or mass in the breast is the most common symptom of breast cancer. You might feel the lump while doing a self-exam, or your doctor might find it during a check-up. Most lumps — more than 80 percent — actually aren’t cancer.

Other symptoms besides a lump that warn of breast cancer include:

  • a nipple that turns inward (retraction)
  • redness, scaling, or thickening of the nipple
  • a change in the texture of the skin on the breast
  • clear or bloody discharge from the nipple, or a milky discharge if you’re not breastfeeding
  • dimpled skin on the breast
  • breast or nipple pain
  • a change in the size or shape of the breast

Watch out for any of these breast changes, and report them to your doctor right away. The earlier breast cancer is caught, the better your chances of successful treatment.

Every woman’s nipples are slightly different, and most nipple changes are nothing to worry about. Still, you should be alert for any changes to the shape, size, or color of your nipples and report them to your doctor.

One sign of breast cancer is that your nipples suddenly push in toward your body rather than pointing out. Nipples that do this are called inverted or retracted.

A change in the texture or color of the nipple might also be a sign of cancer. Look for a scaly, itchy rash or dimpling that resembles the skin of an orange. The nipple might also turn red or purple.

Fluid that isn’t breast milk might leak out of your nipples. That fluid can be clear, milky, or blood-tinged. It will leak out on its own when lightly expressed.

Some women naturally have inverted nipples. If your nipples were always inverted, there’s no need to worry, but if they’ve recently retracted, call your doctor.

An infection of the mammary ducts called mammary duct ectasia can also change your nipple orientation. This condition commonly affects women over age 50.

A milky nipple discharge is perfectly normal if you’ve recently given birth or if you’re breastfeeding.

Even if you’re not pregnant or nursing, nipple discharge is usually a sign of a benign condition, such as:

  • an underactive thyroid gland
  • injury to the breast
  • infection
  • a noncancerous or benign tumor
  • some medicines, including birth control pills

If fluid comes out when you squeeze your nipples, it’s likely just the natural fluid that’s carried through your breast ducts. This fluid can be yellow, green, or brown.

A change in the color or texture of the skin on your breast can be a sign of breast cancer.

Look for these types of changes:

  • scaling or flakes
  • crusting
  • dimpling or puckering, which causes the skin to become textured like an orange peel
  • swelling
  • redness
  • bleeding
  • sores that don’t heal
  • itching
  • change in skin color
  • visible veins in the breast, which can be a sign of increased blood flow to the cancer

Skin changes aren’t necessarily cancer, but they can sometimes warn of a rare type of breast cancer, like Paget disease or inflammatory breast cancer. Let your doctor know if your skin doesn’t go back to its normal appearance within a few days.

A few other skin conditions can affect your breasts, including:

  • rashes
  • moles
  • skin infections

Skin changes such as rashes and skin infections should clear up within a few days. If they don’t go away, have your doctor take a look.

Sometimes when you have cancer, one breast will grow larger than the other. Look for a sudden change in breast size, or a breast that continues to grow. Any unexpected changes to your breast size warrant a call your doctor.

Some women naturally have two different-sized breasts. If your breasts were always different in size, there’s no need to worry.

Your breasts can also change shape during times of hormonal transition, such as during pregnancy and menopause. Call your doctor if the change seems sudden, dramatic, and it doesn’t appear to be linked to any hormone issue.

Breast cancer rarely causes pain. About 2 to 7 percent of women with a painful breast lump will be diagnosed with cancer. The pain may start when the lump presses on nearby nerves.

Inflammatory breast cancer is a rare form of the disease that can cause tenderness or burning pain in your breast. The affected area will also be swollen and red, and will look pitted like an orange skin.

Because this type of breast cancer spreads very quickly, it’s important to see your doctor if you have any breast pain.

Breast pain usually isn’t a symptom of cancer.

More common causes of discomfort include:

  • puberty
  • menstrual periods
  • pregnancy, especially during the first trimester
  • breastfeeding
  • injury to the breast
  • past breast surgery
  • an infected milk duct (mastitis)
  • menopause
  • fibrocystic breasts

Certain medicines may also cause breast pain:

The pain may feel like a burning, tightness, prickling, or stabbing. If your pain isn’t connected with your period or another hormonal transition, and it doesn’t go away, see your doctor.

If you notice any unusual symptoms or unexpected changes in your nipples or breasts, consult your doctor. Be sure to mention any family history of cancer, as this may affect your risk level.

After assessing your symptoms and performing a physical exam, your doctor might send you for a mammogram. A mammogram is an X-ray used to diagnose breast cancer.

If you do have cancer, catching it early will give you a good chance of successfully treating it.

Your symptoms may also be a sign of another underlying condition. Your doctor will work with you to determine the best course of treatment and care.

No matter the cause, you should get in the habit of regularly checking your breasts for any changes like lumps, swelling, or discoloration. If you notice anything different, make an appointment with your doctor.

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