Most bruises heal completely within two to three weeks. A minor bump on the arm or face often fades in 10 to 14 days, while a deep bruise on the leg can linger for three weeks or longer. The timeline depends on where the bruise is, how hard the impact was, your age, and your overall health.
The Typical Healing Timeline
A bruise forms when small blood vessels under the skin break and leak blood into the surrounding tissue. Your body then breaks down that trapped blood in stages, and you can roughly track the process by color. Fresh bruises appear red or purple. Over the next day or two, they shift to a deeper blue. Then, over the following days, the bruise turns brown before finally fading to green or yellow as your body finishes clearing the debris.
Yellow won’t appear in a bruise until at least 18 to 24 hours after the injury, and in most cases it takes several days to show up. The progression isn’t perfectly predictable. Two people with the same injury can bruise differently, and even two bruises on the same person can change color at different rates. But as a general rule, once a bruise turns yellow or greenish-brown, it’s in the final stretch of healing.
What’s Happening Under the Skin
The color changes aren’t random. They reflect a chemical process your body uses to dismantle escaped blood cells. When red blood cells leak into tissue, they release hemoglobin, the oxygen-carrying protein that gives blood its red color. Your body converts hemoglobin first into a brownish compound, then into a greenish one, and finally into a yellowish one that gets reabsorbed and carried away. Each stage corresponds to the color you see through the skin.
This cleanup is handled by immune cells that act like a recycling crew, engulfing and processing the leaked blood. In healthy tissue with good blood flow, the whole cycle takes about 10 to 14 days. When circulation is poor or the immune response is sluggish, that resorption can stretch to three weeks or beyond.
Why Location Matters
Bruises on your legs heal more slowly than bruises on your face or arms. Gravity pulls leaked blood downward, which is why a thigh bruise may spread toward the knee over the first couple of days. Legs also have lower blood flow compared to the face, which slows the cleanup process. A bruise on your cheek might fade in a week, while the same force applied to your shin could leave a mark for two to three weeks.
Age and Skin Changes
Older adults bruise more easily and heal more slowly. As skin ages, it loses the fatty layer and collagen that cushion blood vessels, so even minor bumps cause leaks. The condition is common enough to have a clinical name: actinic purpura. These bruises, which show up most often on the forearms and backs of the hands, can take three weeks to resolve instead of the typical two. The delay happens because the normal immune response that clears trapped blood becomes less efficient with age.
Medications That Slow Healing
Blood thinners are the most common reason bruises take longer to clear. Medications like warfarin and rivaroxaban interrupt your body’s clotting process, which means more blood escapes into the tissue after an injury and takes longer to stop spreading. The result is larger, darker bruises that can persist well beyond the normal two-week window. Aspirin and certain supplements like fish oil have a similar, milder effect. If you’re on any of these and noticing bruises that seem to last three or four weeks, the medication is the likely explanation.
Nutritional Factors
Vitamin C plays a direct role in maintaining the connective tissue that holds blood vessels together. When levels drop too low, capillary walls weaken and break more easily, leading to frequent and stubborn bruising, especially on the legs. In documented cases of severe deficiency, bruising and bleeding resolved quickly once vitamin C supplementation began. You don’t need mega-doses. Consistent intake from citrus fruits, peppers, strawberries, or a basic supplement keeps your blood vessels structurally sound.
Vitamin K is also involved, though its role is in the clotting cascade rather than vessel integrity. Low vitamin K can mean your body is slower to form the initial clot that stops blood from spreading into tissue, producing larger bruises from the start.
How to Speed Up Healing
Cold therapy in the first 24 to 48 hours is the most effective first step. Applying an ice pack (wrapped in a cloth) for 15 to 20 minutes at a time constricts blood vessels and limits how much blood leaks into the surrounding tissue. This won’t make an existing bruise disappear, but it reduces the size and severity of the bruise that forms. After the initial swelling settles, switching to gentle warmth can help increase circulation to the area and support the cleanup process.
Topical arnica is one of the few over-the-counter remedies with some clinical support. In a controlled trial, a 20% arnica ointment reduced bruising more effectively than a placebo and more effectively than low-concentration vitamin K creams. It’s not a dramatic difference, but if you want to give a bruise a nudge, arnica is a reasonable option. Apply it a few times a day starting as soon as possible after the injury.
Elevation helps too, particularly for leg bruises. Propping the bruised area above heart level when you’re resting reduces blood pooling and can shorten the overall timeline by a day or two.
When a Bruise Isn’t Just a Bruise
Most bruises are harmless and resolve on their own. But a hematoma, where a larger pocket of blood collects and forms a firm lump under the skin, is a different situation. Signs include a swollen area that feels hard or warm to the touch, significant pain, and redness that spreads rather than fades. If a bruise keeps expanding over several days instead of gradually shrinking, or if the lump doesn’t soften within a week or two, it’s worth getting evaluated.
Bruising that appears without any injury you can remember, or that shows up in unusual places like the trunk or abdomen, can signal a clotting disorder, a medication side effect, or a nutritional deficiency. Frequent unexplained bruising, especially combined with nosebleeds or bleeding gums, points toward something systemic rather than simple bumps you’ve forgotten about.