A bruise starts as a pinkish-red mark and gradually shifts through a predictable sequence of colors as it heals: dark blue or purple, then violet, green, dark yellow, and finally pale yellow before fading completely. Most bruises heal within about two weeks. The exact appearance at any given moment depends on how old the bruise is, how deep the injury goes, and your skin tone.
The Color Stages of a Healing Bruise
When something hits you hard enough to break tiny blood vessels beneath the skin, blood leaks into the surrounding tissue. That trapped blood is what you see as a bruise, and its color tells you roughly how far along it is in the healing process.
In the first day or two, a bruise typically looks red or pinkish because the blood pooling under the skin still contains fresh, oxygen-rich hemoglobin. Within a day or so, that hemoglobin loses oxygen and the bruise deepens to a dark blue or purple. Over the next several days, your body begins breaking down the hemoglobin. The first breakdown product gives the bruise a greenish tint. That compound is then converted into a second one responsible for the yellow hue that appears in the final stage of healing. The bruise lightens to pale yellow before disappearing entirely.
These stages don’t follow a rigid clock. A mild bump on your forearm might cycle through all the colors in a week, while a deeper injury on your thigh could take the full two weeks or longer. You may also see multiple colors at once, especially in a larger bruise, because the edges and center heal at different rates.
How Bruises Look on Darker Skin Tones
On lighter skin, the full red-to-purple-to-green-to-yellow progression is usually easy to spot. On darker skin tones, bruises may appear purple, dark brown, or black rather than the classic blue-purple, and the green and yellow stages can be harder to see visually. As healing progresses, the bruise may turn a lighter shade of brown before fading. The underlying process is identical, but the visible color contrast against the skin differs.
Flat Bruise vs. Raised Lump
Most bruises are flat patches of discoloration. The medical term for this is ecchymosis: blood has leaked from damaged vessels and spread through the tissue beneath your skin. It may be tender when you press on it, but the surface stays level with the surrounding skin.
A hematoma is different. It forms when a larger volume of blood collects in one spot, creating a raised, firm lump that’s often noticeably painful to the touch. Hematomas can feel like a knot under the skin and take longer to resolve than a standard bruise. If you have a lump that keeps growing, feels very hard, or causes significant pain, it’s worth having it evaluated.
Small Spots vs. Full Bruises
Not every blood-related mark on your skin is a bruise in the usual sense. Tiny pinpoint dots smaller than 4 millimeters in diameter (about the size of a pencil eraser tip) are called petechiae. They often appear in clusters and look like a rash of flat red or purple specks. Slightly larger spots between 4 and 10 millimeters are classified as purpura. Once a discolored area exceeds 1 centimeter, roughly the width of a fingertip, it qualifies as a full bruise. Petechiae and purpura that appear without an obvious injury can signal a problem with blood clotting or platelet levels, so they’re worth paying attention to.
When a Bruise Feels Deeper Than the Skin
A bone bruise doesn’t always look dramatically different on the outside. You might see some surface discoloration and swelling, or you might not see much at all because the injury is deep inside the bone. The key difference is how it feels. A regular skin bruise is tender at the surface, especially when touched. A bone bruise produces a dull, throbbing ache that feels like it’s coming from deep inside your body, and it tends to hurt more with activity or weight-bearing.
Bone bruises also take significantly longer to heal. While a skin bruise clears up in a couple of weeks, a bone bruise can take weeks to months because damaged bone tissue needs more time and rest to recover. If you have persistent deep pain after an impact, especially near a joint, it’s possible the injury goes beyond the skin.
Why Some Bruises Look Worse Than Others
Several factors can make a bruise appear larger, darker, or slower to fade. Age plays a major role: as you get older, your skin thins and the small blood vessels beneath it become more fragile, so bruises tend to spread more and look more dramatic. The location matters too. Areas with loose skin and little muscle padding, like the backs of the hands or the inner arms, bruise more visibly than well-padded areas like the thighs.
Medications are another common factor. Blood thinners, aspirin, ibuprofen, and other anti-inflammatory drugs all reduce your blood’s ability to clot. When clotting is slower, more blood escapes from damaged vessels before the leak is sealed, producing a bruise that’s larger and more intense in color. If you take any of these medications regularly, you’ll likely notice that even minor bumps leave noticeable marks. Taking a blood thinner alongside an over-the-counter anti-inflammatory can amplify this effect further.
Bruises that appear frequently without clear cause, show up in unusual locations like the torso, ears, or neck, or don’t progress through the normal color changes over two weeks may point to an underlying issue worth investigating. In young children, bruising in certain protected areas of the body (the torso, neck, ears, or cheeks) is considered more concerning than bruising on the shins or forehead, which are common sites for everyday bumps and falls.