Most bruises heal completely within about two weeks. The exact timeline depends on how hard you were hit, where the bruise is on your body, your age, and whether you take certain medications. A minor bump on your forearm might fade in a week, 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 trapped blood beneath the skin. These color shifts aren’t random. They reflect a specific chemical process happening in the tissue, and tracking them gives you a reliable way to gauge where you are in the healing timeline.
When you first get hit, blood leaks from damaged small blood vessels and pools under the skin. The hemoglobin in those red blood cells gives the bruise its initial red or dark purple appearance. Over the next day or two, as oxygen leaves the trapped blood, the bruise deepens to a blue or dark purple.
Around days five through seven, your body’s cleanup cells start breaking down the hemoglobin. The first byproduct of that breakdown is a green pigment, which is why bruises often take on a greenish tint midway through healing. That green pigment then gets converted into a yellow one, giving the bruise its characteristic yellowish or brownish look in the second week. Iron left over from the process gets stored as a brownish compound, which explains why some bruises leave a faint brown mark even after the tenderness is gone. Once that final discoloration fades, the bruise is fully healed.
Why Some Bruises Take Longer
Location matters. Bruises on your legs tend to heal more slowly than those on your arms or face. Gravity pulls blood downward, which can cause a leg bruise to spread before it starts to fade. Bruises over bony areas like your shin, where there’s less soft tissue to absorb impact, can also feel more painful and take longer to resolve.
Age is one of the biggest factors. As you get older, your skin thins and loses some of the fatty cushioning that protects blood vessels from impact. Research published in the Journal of Clinical and Aesthetic Dermatology found that in older adults, the blood vessels themselves become more permeable, meaning red blood cells can leak into surrounding tissue more easily, even from minor bumps. These age-related bruises (sometimes called senile or actinic purpura) typically resolve in one to three weeks but often leave behind a brownish discoloration that can persist much longer.
Deeper bruises, where more blood has pooled into the tissue, simply take longer because there’s more material for the body to clean up. A light bump that produces a dime-sized bruise and a hard collision that leaves a palm-sized mark are on very different timelines, even in the same person.
Medications That Slow Healing
Several common medications reduce your blood’s ability to clot, which means bruises form more easily and can grow larger before the bleeding stops. Blood thinners are the most obvious culprit, but they’re not alone. NSAIDs like aspirin and ibuprofen also interfere with clotting. So do corticosteroids like prednisone, which thin the skin over time and make blood vessels more vulnerable. Chemotherapy drugs carry the same risk.
If you take any of these and notice that bruises seem to appear from minimal contact or take noticeably longer than two weeks to fade, that’s worth mentioning at your next appointment. The bruising itself isn’t dangerous in most cases, but the pattern can be useful information for adjusting dosages or monitoring your blood’s clotting ability.
What You Can Do in the First 48 Hours
The size a bruise ultimately reaches depends partly on how much bleeding occurs before your body seals off the damaged vessels. Icing the area early can help limit that bleeding. Apply ice with a cloth or towel between it and your skin, for 10 to 20 minutes at a time, every hour or two. This is most effective within the first eight hours after injury.
Elevating the bruised area above your heart when possible also helps by reducing blood flow to the injured spot. If the bruise is on your leg, lying down with your leg propped on pillows is a simple way to do this. Compression with a snug (not tight) bandage can provide additional support and help limit swelling, particularly for bruises on the arms or legs.
After the first couple of days, the goal shifts from limiting the bruise to helping your body clear the pooled blood. Gentle warmth, like a warm washcloth, can increase circulation to the area and speed up that cleanup process.
Does Arnica Actually Help?
Arnica, a plant-based remedy sold as creams and gels, is one of the most popular over-the-counter options for bruises. The evidence is mixed but leans slightly positive. A rater-blinded study found that 20% topical arnica ointment decreased bruise healing time compared to both petroleum jelly and a vitamin K/retinol cream. Another study in patients who had facial cosmetic surgery found that arnica reduced the area of bruising at days one and seven after the procedure, though the difference disappeared by day ten. At least one other trial found no effect at all.
The takeaway: arnica probably won’t dramatically speed things up, but it may modestly reduce bruise size or duration, particularly if applied soon after injury. It’s unlikely to cause harm when used topically.
Nutrient Deficiencies and Easy Bruising
Vitamin C plays a key role in maintaining the collagen that supports your blood vessels. When levels drop too low, vessel walls weaken and bruises appear more readily, sometimes from pressure as minor as leaning against a counter. Vitamin K is essential for normal blood clotting. A significant deficiency means your body can’t stop bleeding as quickly once a vessel is damaged, leading to larger, longer-lasting bruises. Both deficiencies are uncommon in people eating a reasonably varied diet, but they’re worth considering if your bruising pattern has changed without an obvious explanation.
When a Bruise May Be Something More
A standard bruise is flat or only slightly swollen, tender to the touch, and gradually fades through the color stages described above. A hematoma is different. It forms when a larger volume of blood collects in one area, creating a firm, raised lump that pushes outward against surrounding tissue. Hematomas can cause noticeable swelling, and if they press on nearby nerves, you may feel tingling, numbness, or sharp pain beyond what a normal bruise produces.
Small hematomas often resolve on their own, though they take longer than typical bruises. Larger ones sometimes need medical drainage. Signs that a bruise deserves professional attention include a lump that keeps growing, numbness or tingling near the injury, a bruise that shows no improvement after two weeks, bruises that appear frequently without clear cause, or a bruise accompanied by severe pain that limits your ability to move the affected joint or limb. Bone bruises, which occur deeper in the tissue, can take weeks to months to fully heal and may require imaging to identify.