A sprained ankle typically looks swollen and puffy around the ankle joint, often with bruising that spreads across the foot and up the lower leg. The severity of these visual changes depends on how badly the ligaments are damaged, ranging from mild puffiness you might barely notice to dramatic swelling that makes your ankle look twice its normal size.
Swelling: The First Thing You’ll See
Swelling is the most immediate and obvious sign of a sprained ankle. It usually starts within minutes of the injury and continues to build over the first 24 to 48 hours. In a mild (grade 1) sprain, the swelling may be subtle, just enough to make one ankle look slightly larger than the other. A moderate (grade 2) sprain produces noticeably more swelling, giving the ankle a rounded, puffy appearance that can obscure the normal contours of the ankle bones. A severe (grade 3) sprain, where a ligament is completely torn, causes significant swelling that can extend from the foot up toward the calf.
The swelling tends to concentrate on the outer side of the ankle for the most common type of sprain, which happens when the foot rolls inward. You may notice that the hollow dip just below and in front of your outer ankle bone fills in and becomes smooth or even bulging. If you compare both ankles side by side, the difference is usually obvious.
Bruising Patterns and Color Changes
Bruising often follows the swelling, though it may take several hours or even a day to become visible. The initial color is typically reddish or purplish, appearing around the outer ankle where the ligament damage occurred. Over the next few days, the bruise can spread. It’s common to see discoloration creep down along the side of the foot and underneath the arch, following the path of gravity as blood pools in the soft tissue.
As the bruise ages, the colors shift through a familiar progression: dark purple or blue in the first two to three days, then greenish-yellow as the body breaks down and reabsorbs the blood. In moderate and severe sprains, the bruising can be extensive enough to cover the entire outer ankle and much of the foot, which can look alarming even though the color itself isn’t a sign of something more serious. Mild sprains may produce little or no visible bruising at all.
What Each Grade Looks Like
A grade 1 sprain is the mildest form. The ligament is stretched but not torn. Visually, you’ll see slight swelling around the ankle, and the joint will still look mostly normal in shape. Bruising is minimal or absent. You can usually still put weight on it, though it hurts.
A grade 2 sprain involves a partial tear of the ligament. The swelling is more pronounced, and bruising is clearly visible. The ankle may look visibly thicker or rounder than the uninjured side. Tenderness and swelling typically center on the soft tissue below and in front of the outer ankle bone.
A grade 3 sprain means the ligament is completely torn. The ankle swells significantly, bruising is widespread, and the joint may feel unstable or “loose” when you try to move it. Severe swelling can make the entire lower ankle and foot look distorted, though the bones themselves remain in place.
Where the Swelling Appears Matters
Most ankle sprains are “low” sprains, meaning the damage is to ligaments on the outer side of the ankle. About 80% of these happen when the ankle rolls inward. The swelling and bruising cluster around and below the bony bump on the outside of your ankle.
A high ankle sprain is a different injury. It involves the ligaments above the ankle joint that connect the two shin bones. With a high ankle sprain, the bruising and swelling appear higher on the leg, closer to the lower shin rather than around the ankle bone itself. The ankle may not look as dramatically swollen as a low sprain, which can be misleading because high ankle sprains often take longer to heal.
Sprain vs. Broken Ankle: Visual Differences
This is often the real question behind the search. A sprained ankle and a broken ankle can look similar in the first few hours, with both producing swelling and bruising. But there are visual clues that suggest a fracture rather than a sprain.
A broken ankle may look visibly deformed or have an unnatural angle or bend. In rare, severe cases, bone may be visible through the skin. With a sprain, the ankle swells but keeps its overall shape. Pain location also helps: sprain pain tends to center on the soft, fleshy areas of the ankle, while fracture pain is usually sharpest directly over a bone.
Clinicians use a set of guidelines called the Ottawa Ankle Rules to decide whether an X-ray is needed. The key warning signs are: inability to put weight on the ankle, inability to take four steps, or sharp tenderness when pressing directly on specific ankle bones. If any of these apply, imaging is warranted to rule out a fracture. These rules have been validated for adults and children over age five.
What to Expect Over the First Week
In the first 24 to 48 hours, swelling typically peaks. The ankle will look its worst during this window, often appearing much larger than normal and feeling tight or warm to the touch. Applying ice and keeping the foot elevated above heart level helps limit how much fluid accumulates.
By days three to five, the swelling usually begins to recede, and bruising becomes more colorful as it shifts from deep purple toward green and yellow. The bruise may also migrate, appearing in areas you didn’t expect, like the toes or the sole of your foot. This is normal and simply reflects gravity pulling the leaked blood downward through the tissue.
A mild sprain often looks close to normal within a week or two. Moderate sprains can remain visibly swollen for several weeks, and severe sprains may take months before the ankle fully returns to its usual appearance. Even after the swelling resolves, some people notice that the injured ankle looks slightly thicker than the other side for an extended period, particularly if significant scar tissue forms during healing.