A bunion is a bony bump that forms on the inside edge of your foot, right where your big toe meets the rest of your foot. The hallmark look is a hard, protruding knob on the side of the foot paired with a big toe that angles inward toward your other toes. In mild cases, the bump may be barely noticeable. In severe cases, the big toe can lean so far that it overlaps or tucks under the second toe, dramatically changing the shape of the entire front of your foot.
The Bump and the Lean
What you’re actually seeing when you look at a bunion is a joint that has shifted out of alignment. The long bone behind your big toe drifts outward toward the edge of your foot, while the big toe itself angles inward. That creates two visible changes at once: the bony protrusion on the inner side of your foot and the tilted position of the toe. The bump isn’t new bone growth. It’s the head of that displaced bone pushing against the skin.
In the early stages, you might only notice a slight widening at the base of the big toe or a small bump that becomes more obvious in tight shoes. Over time, the angle increases and the bump becomes more prominent even when you’re barefoot. Doctors classify severity by measuring the angle of deviation on an X-ray. A normal big toe joint sits at roughly 15 to 20 degrees. A mild bunion pushes that angle up to about 30 degrees. Moderate bunions fall between 30 and 40 degrees, and severe bunions exceed 40 degrees, where the toe displacement is hard to miss.
Skin Changes Around the Joint
The bump itself often looks red or slightly discolored, especially after a day in shoes. That redness comes from friction and pressure irritating the skin and the tissue underneath. Swelling around the joint is common, and the area can feel warm to the touch.
Because the big toe leans into the second toe, the two often rub together. This friction creates corns or calluses between the toes or on top of the second toe. You may also develop thickened, hardened skin on the sole of your foot beneath the ball, as the misaligned joint changes how your weight distributes when you walk. In some cases, the small fluid-filled cushions around the joint (called bursae) become inflamed, adding a soft, puffy swelling on top of the bony bump.
What Happens to the Other Toes
A bunion doesn’t just affect the big toe. As it leans inward, it pushes against the second toe, and sometimes the third. Over time, this crowding can force the smaller toes into abnormal positions. The second toe may start to bend upward at the middle joint, creating a hammertoe, or it may drift over or under the big toe entirely. If you notice your second toe starting to ride on top of or curl beneath your big toe, the bunion has progressed enough to destabilize the neighboring joints.
Tailor’s Bunion: The Other Side
Not all bunions form at the big toe. A tailor’s bunion (sometimes called a bunionette) is a smaller version that develops on the opposite side of your foot, at the base of your pinky toe. It looks like a bony bump on the outer edge of your foot, and the pinky toe may angle inward toward its neighbors, mirroring what happens with a big-toe bunion. Redness, swelling, and calluses on the pinky toe are common. The name dates back to tailors who sat cross-legged on hard floors, putting constant pressure on the outside of their feet.
Bunion vs. Gout Flare
Because gout most commonly strikes the same joint at the base of the big toe, the two conditions are easy to confuse at first glance. The key difference is speed. A bunion develops gradually over months or years, and the bump is always there, getting slightly larger over time. A gout flare appears suddenly, often overnight, with extreme swelling, intense redness, and heat that makes the joint look angry and inflamed. During a gout attack, even the light pressure of a bedsheet on the toe can cause severe pain. Once the flare subsides, the joint returns to its normal appearance.
A bunion, by contrast, is a permanent structural change. The bump doesn’t come and go. It may look more irritated on some days than others depending on your footwear and activity level, but the bony protrusion and the inward lean of the toe are always visible. If you’re unsure whether you’re looking at a bunion or something else, the timeline tells the story: slow and steady points to a bunion, sudden and severe points to gout or another inflammatory condition.
How It Changes Over Time
Bunions are progressive. They don’t reverse on their own. In the earliest stage, the bump is subtle enough that it mainly causes problems with shoe fit. You might notice your usual shoes feel tighter on one side, or that the ball of your foot aches after long walks. At this point, the toe alignment still looks mostly normal when you’re barefoot.
As the condition progresses to a moderate stage, the bump becomes obvious without shoes and the big toe visibly leans into the second toe. Redness and calluses are more persistent. In a severe bunion, the big toe may cross over or under the adjacent toe, the bump is large and prominent, and the entire forefoot looks wider and misshapen compared to the other foot. The skin over the bump may be chronically thickened and irritated, and finding comfortable shoes becomes a daily challenge.