Most bruises heal completely within about two weeks. The exact timeline depends on the severity of the injury, where it is on your body, and individual factors like age and medication use. A mild bump on the arm might fade in 10 days, while a deep bruise on your thigh could linger for three weeks or more.
The Color Stages of Healing
A bruise changes color as your body breaks down the blood trapped under your skin, and those color shifts are actually a reliable way to gauge where you are in the healing process. When you first get hit, small blood vessels rupture and leak red blood cells into the surrounding tissue. That gives the bruise its initial red or dark pink appearance.
Over the next day or two, the bruise deepens to blue or purple as the blood loses oxygen. This is the stage most people think of when they picture a bruise, and it’s often the most tender. From there, your immune cells get to work dismantling the hemoglobin in those trapped red blood cells. The heme portion of hemoglobin gets converted into a green pigment, which is why bruises often take on a greenish tint around days 5 to 7. That green pigment then transforms into a yellow one, giving the bruise its final faded, yellowish-brown look before it disappears entirely. The brownish tinge you sometimes see comes from iron left behind, which your body gradually reabsorbs.
If your bruise isn’t progressing through these color changes, or if it stays dark and unchanged for more than two weeks, that’s worth paying attention to.
What You Can Do in the First 48 Hours
The window for meaningfully reducing a bruise’s size and healing time is narrow. Cold therapy works best in the first eight hours after the injury. Wrap ice or a cold pack in a thin cloth and apply it for 10 to 20 minutes at a time, repeating every hour or two. This constricts the damaged blood vessels, limiting how much blood leaks into the tissue. Less leaked blood means a smaller, faster-healing bruise.
Elevating the bruised area above your heart also helps during this early phase, since gravity reduces blood flow to the injury site. After the first couple of days, gentle warmth can encourage circulation and help your body clear the trapped blood more quickly. A warm (not hot) compress for 10 to 15 minutes works well at this stage.
Why Some Bruises Take Longer
Not all bruises are created equal. A bruise on your shin, where there’s very little fat or muscle between skin and bone, often looks worse and lasts longer than one on a fleshier area. Deep muscle bruises from harder impacts can take three to four weeks to fully resolve because there’s simply more blood to clean up. Bone bruises, which happen when the impact is forceful enough to damage the bone’s surface, last even longer. Most bone bruises take a few weeks to heal, but severe ones can persist for months.
Age plays a significant role. As you get older, your skin thins and loses some of the fatty padding that cushions blood vessels, so bruises form more easily and from less force. The healing process also slows with age because of changes in how skin cells communicate with immune cells. Research at Rockefeller University found that in older skin, the cells responsible for repairing tissue are much slower to migrate to the injury site, adding days to the healing timeline.
Blood-thinning medications, including aspirin, warfarin, and newer anticoagulants, make bruises both easier to get and slower to heal. These medications reduce your blood’s ability to clot, so the tiny broken vessels at the injury site take longer to stop leaking. If you’re on a blood thinner, it’s normal for bruises to be larger and more vivid than what you’d expect from a given bump.
Nutritional Factors That Affect Healing
Two vitamins are directly involved in how your body handles bruising. Vitamin K is essential for blood clotting. If you’re low on it, your blood takes longer to clot at the injury site, which means more bleeding under the skin and a bigger, slower-healing bruise. Signs of vitamin K deficiency include bruising easily and cuts or scabs that seem slow to stop bleeding. Leafy greens like spinach, kale, and broccoli are the richest dietary sources.
Vitamin C supports the collagen that keeps blood vessel walls strong. Without enough of it, vessels become fragile and rupture more easily, leading to frequent bruising even without noticeable injury. Citrus fruits, bell peppers, and strawberries are reliable sources. If you’re bruising often and can’t point to an obvious cause, these deficiencies are worth considering.
When a Bruise Signals Something More
A bruise that hasn’t healed within two weeks, frequent bruises you can’t explain, or bruising accompanied by muscle weakness, tingling, numbness, or skin color changes from poor circulation all warrant a conversation with a healthcare provider. These patterns can point to clotting disorders, medication side effects, or other underlying conditions.
A hematoma, which is a larger, more organized collection of blood under the skin, sometimes forms after a significant impact. Hematomas feel firm or lumpy to the touch and can be quite painful. Most resolve on their own, but a hematoma that keeps growing, limits your movement, or causes pressure on surrounding tissue may need medical drainage. Seek emergency care if a bruise or head injury is followed by trouble breathing, chest pain, sudden severe headache, one-sided weakness, vision changes, difficulty speaking, or loss of consciousness.