Bruises are something most people experience from time to time. They often appear after bumping into furniture, exercising, or sustaining a minor injury. In many cases, they are harmless and fade away within a couple of weeks. However, bruises that appear without a clear cause, occur frequently, or are unusually large may sometimes indicate an underlying medical condition. Although some social media posts claim that unexplained bruises always mean cancer, the truth is far more complex. While certain blood cancers can contribute to easy bruising, there are many other, much more common explanations.
A bruise develops when small blood vessels beneath the skin are damaged, allowing blood to leak into surrounding tissues. As the body gradually reabsorbs the blood, the bruise changes color from dark purple or blue to green, yellow, and finally brown before disappearing. This healing process is completely normal.
There are several reasons why some people bruise more easily than others. Aging naturally makes the skin thinner and blood vessels more fragile. Certain medications, including blood thinners, aspirin, corticosteroids, and some anti-inflammatory drugs, may increase the likelihood of bruising. Vitamin deficiencies, especially low levels of vitamins C or K, can also affect blood vessel strength and normal clotting.
