A sprained ankle typically looks swollen and puffy around the ankle bone, often with bruising that spreads across the outer foot and sometimes up the lower leg. The exact appearance depends on how severely the ligaments were damaged, but some degree of visible swelling shows up in nearly every sprain. Here’s what to expect at each stage and how to tell what you’re looking at.
What a Sprained Ankle Looks Like
The most obvious visual sign is swelling. Within the first hour or two, the area around the injured ligaments puffs up as fluid rushes to the site. In a mild sprain, this may look like a slight fullness around the ankle bone that makes one side look rounder than the other. In a moderate or severe sprain, the swelling can be dramatic enough to erase the normal contours of your ankle entirely, making it look like a smooth, rounded mass where the ankle bone used to be visible.
Bruising is the second hallmark. When ligament fibers tear, small blood vessels tear with them, and blood leaks into the surrounding tissue. This creates the classic black-and-blue discoloration, though it often doesn’t appear right away. It can take a day or two for the bruising to become visible on the skin’s surface, and it tends to spread downward with gravity, pooling along the sides of the foot, under the ankle bone, and sometimes into the toes. Mild warmth and redness around the injury are also common in the first few days as your body’s inflammatory response kicks in.
Appearance by Severity Grade
Sprains are classified into three grades based on how much ligament damage has occurred, and each grade looks noticeably different.
Grade 1 (mild): You’ll see mild swelling and stiffness localized around the ankle bone. Bruising may be minimal or absent. The ankle still looks mostly like an ankle, just slightly puffy on one side. You can usually still bear weight, though it’s uncomfortable.
Grade 2 (moderate): Swelling is more pronounced, and bruising is clearly visible. The ankle looks noticeably larger than normal, and the skin may have a reddish or purplish tint. Walking is significantly more difficult, and the joint may feel unstable when you try to stand.
Grade 3 (severe): The ankle is severely swollen with extensive bruising that can cover large areas of the foot and lower leg. The joint may look misshapen because the ligament is completely torn, and the normal bony landmarks are buried under fluid. Putting any weight on it is usually impossible.
Where the Swelling Appears
The location of swelling and bruising tells you something about which ligaments are involved. About 80% of ankle sprains are inversion injuries, meaning your foot rolled inward. In these cases, swelling and bruising concentrate on the outside of the ankle, just below and in front of the bony bump on the outer side.
A high ankle sprain, which happens when the foot and leg twist outward, looks different. The bruising and swelling appear higher on the leg, above the ankle joint itself, closer to where the two lower leg bones meet. This can be confusing because the ankle itself may not look as swollen as you’d expect, but the area a few inches above it is puffy and discolored. Less commonly, a sprain on the inner side of the ankle produces swelling near the bony bump on the inside.
How Bruising Changes Over Time
The color of a sprained ankle evolves in a predictable pattern. In the first day or two, damaged blood vessels leak blood into the tissue, creating a dark red or deep purple discoloration. Over the following days, this shifts toward a blue-black shade as the blood settles. By about a week, the bruise often fades to greenish or yellowish tones as your body breaks down and reabsorbs the leaked blood. The entire process from dark purple to fully resolved typically takes about two weeks, though severe sprains can take longer.
One thing that catches people off guard is how far the bruising can travel. Because blood follows gravity, it’s common to see discoloration spread to areas that weren’t actually injured. You might notice bruising on the sole of your foot, along your toes, or on the opposite side of the ankle from where the sprain occurred. This looks alarming but is normal.
Sprained Ankle vs. Broken Ankle
Sprains and fractures can look remarkably similar from the outside, and it’s not always possible to tell the difference without an X-ray. Both cause swelling and bruising in overlapping locations. However, there are a few visual and functional clues that lean toward a fracture.
If the ankle looks visibly deformed, with an unusual angle or a bump where bone appears displaced, that strongly suggests a fracture rather than a sprain. Doctors also look at specific signs to decide whether imaging is needed: tenderness directly over the bony tips of the ankle (rather than in the soft tissue between them), inability to put any weight on the foot immediately after the injury, and inability to walk four steps even after the initial shock passes. These criteria, known as the Ottawa Ankle Rules, are the standard screening tool in emergency departments. If you notice any of these, an X-ray is warranted.
Increasing discoloration that turns very dark red or black, numbness, tingling, or a cold feeling in the foot are also signs that something beyond a simple sprain may be going on.
What the Swelling Timeline Looks Like
Swelling reaches its peak within the first 24 to 48 hours after injury. During this window, the ankle looks its worst. Icing and elevating during this period helps limit how much fluid accumulates, which is why early treatment matters for both comfort and appearance.
After the first two days, swelling gradually begins to decrease if the ankle is being rested and elevated. A mild sprain may look nearly normal within a week. A moderate sprain often stays visibly swollen for two to three weeks, and a severe sprain can remain puffy for six weeks or longer. Some people notice mild residual swelling for months, especially after being on their feet for extended periods. This lingering puffiness is common and doesn’t necessarily mean the injury isn’t healing.