What are the Most Common Causes of a Breast Bruise?

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  • Written By: Dulce Corazon
  • Edited By: W. Everett
  • Last Modified Date: 13 October 2019
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The appearance of a breast bruise can often cause alarm in many women. It usually appears as a skin discoloration, which can be blue, green, or purple, in one or both breasts. One of the most feared causes of breast bruise is inflammatory breast cancer. Other common causes of breast bruise include injury or trauma to the breast, coagulopathy disorders, and blood-thinning medications. Wearing of ill-fitting bras may also result in the formation of a breast bruise.

One type of breast cancer that may cause breast bruise is inflammatory breast cancer. It usually occurs when cancer cells cause blockage in the lymph nodes of the breast. This type of cancer occurs very rarely. Symptoms include enlargement of the affected breast, skin discoloration that ranges from red to purple, appearance of dimples in the skin, and tenderness or pain. The breast may also feel warm to the touch, and the nipple may be flattened.

Trauma or injury to the breast can also lead to the formation of a breast bruise. It may be due to blunt trauma in the area, accidents, or fall. These injuries in the chest area may also result in a fractured rib, which needs to be evaluated by a physician. Depending on the severity of the trauma, the breast bruise can vary in size. Affected patients may observe skin discolorations and tenderness or pain in the affected breast area.


Women who wear ill-fitting bras can often observe discoloration in the skin of both breasts after taking their bras off. This may sometimes alarm them. This type of bruise, however, may disappear if use of such bra is discontinued.

Anticoagulant medications are drugs used to prevent the formation of blood clots in the body. They are also called blood thinners. Use of these drugs can frequently result in bleeding, which is why most patients taking them are monitored regularly. Bleeding under the skin can occur, not only over the breast area, but also in other parts of the body.

Patients suffering from coagulopathy disorders, also known as bleeding disorders, often develop excessive bruising in different parts of the body. Causes include heredity, liver disease, deficiency in Vitamin K, and use of anticoagulant medications. Women who find a breast bruise upon self-inspection are often urged to see their gynecologists or family physicians for evaluation.


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Post 8

I have breast pain on the side of my right breast. When it first started it kept me up all night. I thought that I had pulled a muscle during some yoga. Three days ago a bruise showed up out of nowhere. I am a little bit scared. I see my gp today and will go get my first mammogram. The pain is still there. Any calming advice?

Post 7

My 90 pound Lab stepped on my right breast when he jumped up onto the bed. I had my mammogram four days later (after he stepped on my breast) and they saw something in the mammogram and I have to go back for an ultrasound of the breast. Could my Lab have bruised my right breast and this is what they are seeing on the mammogram?

Post 6

Yeah I was relaxed about a bruise on my breast for four months. Turned out to be inflammatory breast cancer. If it doesn't go away, get it checked out.

Post 4

Certain kinds of jewelry can also lead to a greenish or bluish discoloration on the skin that looks like a bruise. Bronze and silver jewelry can cause this.

If anyone is wearing long necklaces that come in contact with the skin on their breast and there is discoloration, that might be the reason.

Post 3

@ankara-- It's good that you didn't experience problems from the trauma to your breast.

But my grandmother actually developed breast cancer after a similar trauma to her breast. First it was just bruised, but several months later, she noticed a lump in exactly that area that was injured.

It turned out to be cancer. She's cancer-free now but I think such traumas and bruises can lead to tumors. So women should be careful and make sure to follow up on it. Trauma to the breast, bruises and lumps are among the signs of breast cancer.

Post 2

I hit my breast against the car door several weeks ago. It hurt a lot and it was bruised for about a week.

I didn't worry about it though because I know the trauma of hitting it caused the bruise. It went away on its own.

Post 1

I get that bruising only when wearing a bra or a non tight bra. It's not as serious as they make out here, so ladies relax.

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