Most bruises heal completely within two to three weeks. A minor bump might fade in 10 days, while a deeper bruise from a hard impact can linger for four weeks or more. The timeline depends on the severity of the injury, where it is on your body, and your overall health. Along the way, a bruise shifts through a predictable sequence of colors as your body breaks down and reabsorbs the trapped blood.
What Happens Inside a Bruise
A bruise forms when an impact ruptures small blood vessels beneath the skin without breaking the surface. Blood leaks into the surrounding tissue and pools there, creating the dark, tender mark you see. Your immune system then sends cleanup cells to the site, and these cells methodically dismantle the hemoglobin trapped in the leaked red blood cells.
Hemoglobin breaks down in stages. First it splits into smaller components, one of which gets converted into a green pigment. That green pigment is then converted into a yellow one. The iron left over from the process gets stored as a brownish compound. Each of these byproducts has a distinct color, which is why a bruise changes appearance as it heals rather than simply fading from dark to light.
The Color Stages and What They Mean
Bruise colors follow a general pattern, though the exact timing varies from person to person. A fresh bruise typically looks red or deep purple within the first hours as blood collects under the skin. Over the next day or two, it darkens to a blue or deep purple as oxygen leaves the pooled blood.
Within a few days, you may notice green or dark brown tones creeping in at the edges. This signals that your body is actively breaking down the hemoglobin. Yellow tends to appear no sooner than 18 to 24 hours after the injury, and often later. By the second week, most of the bruise has shifted to yellow-brown or faded yellow-green as the last remnants of broken-down blood are reabsorbed. The color eventually matches your normal skin tone, though deeper bruises can leave a faint brownish stain for a few extra days.
One important caveat: color alone is not a reliable way to pinpoint exactly when an injury happened. Multiple colors often appear in the same bruise simultaneously, and skin tone affects how the colors look from the outside.
Why Some Bruises Take Longer
Several factors determine whether your bruise fades in 10 days or sticks around for a month.
- Location and depth. Bruises on the legs, especially the shins, tend to heal more slowly than bruises on the arms or face. Gravity pulls blood downward, and circulation in the lower legs is naturally slower. A deep bruise over muscle tissue also takes longer than a superficial one.
- Age. Older adults bruise more easily and heal more slowly. The skin thins with age, blood vessels become more fragile, and the fatty layer that cushions them shrinks. A condition called senile purpura, common after age 60, produces flat purple patches on the forearms and hands that can take one to three weeks to resolve and sometimes leave behind lingering brown discoloration.
- Medications. Blood thinners like warfarin and rivaroxaban interrupt clot formation, which means more blood leaks into tissue and takes longer to clear. NSAIDs such as ibuprofen also thin the blood to a degree and can slow healing. Corticosteroids like prednisone weaken the skin’s connective tissue over time and impair the body’s normal repair process. Chemotherapy drugs slow cell growth throughout the body, including the new cells needed to repair damaged tissue.
- Nutrition. Vitamin C is essential for maintaining strong blood vessel walls and building the connective tissue your body uses to repair damage. People who don’t get enough vitamin C bruise more easily and heal more slowly. Vitamin K plays a central role in blood clotting. While severe deficiency is rare in adults, low levels can contribute to prolonged bruising.
How to Speed Up Healing
You can’t make a bruise disappear overnight, but a few straightforward steps can shorten the process noticeably.
Cold therapy is most effective in the first 48 to 72 hours. Applying an ice pack (wrapped in a cloth to protect your skin) for 20 to 30 minutes at a time, at least four times a day, constricts the damaged blood vessels and limits how much blood pools in the tissue. Less pooled blood means a smaller, lighter bruise and a faster recovery.
After the initial swelling subsides, usually around the 48 to 72 hour mark, you can switch to gentle heat. A warm compress increases blood flow to the area, which helps your body clear the trapped blood more efficiently. Elevating the bruised area above heart level during the first couple of days also helps reduce pooling.
Topical arnica, a plant-based ointment, has some clinical support. In a controlled study, a 20% arnica ointment reduced bruise healing time compared to plain petroleum jelly. Separate research on surgical patients found that those treated with arnica had significantly smaller bruised areas on days one and seven after their procedure. The effect is modest, not dramatic, but it’s one of the few over-the-counter options with evidence behind it.
When a Bruise Needs Medical Attention
A standard bruise, even an ugly one, is harmless. But certain signs suggest something more than a routine bump.
A hematoma is a more serious version of a bruise where a larger volume of blood collects in one spot. The skin over a hematoma often feels spongy, rubbery, or lumpy rather than just tender. Most hematomas resolve on their own, but you should contact a doctor if the area shows signs of infection: increasing pain, warmth, redness, red streaks radiating outward, pus, or fever.
A bruise that lasts longer than four weeks, keeps growing after the first day or two, or becomes increasingly painful rather than gradually improving warrants a medical evaluation. The same applies if you’re developing bruises frequently without clear injuries. Unexplained bruising can signal clotting disorders, liver problems, or other conditions that affect how your blood functions.
Bruise Healing at a Glance
- Days 1 to 2: Red to dark purple/blue, most tender and swollen
- Days 3 to 7: Blue-purple shifting to green and brown at edges
- Days 7 to 14: Yellow-green to yellow-brown, noticeably fading
- Days 14 to 21+: Light yellow or faint brown, then gone
Minor bruises on the arms or face often resolve toward the faster end of this range. Deeper bruises on the legs or torso, particularly in older adults or people on blood-thinning medications, tend to land at the slower end or beyond it.