Plantar Plate Tear

The plantar plate is a tough piece of fibrous tissue underneath each toe joint where the toe meets the foot. Its job is to stop the toe from bending up too far — basically a built-in ligament under each toe knuckle. A plantar plate tear is when that tissue gets stretched out or torn through, usually from repeated push-off (running, walking in high heels). Pain shows up on the bottom of the foot under the ball of the toe — most often the second toe. Left untreated, the toe slowly drifts upward and toward its neighbor (a crossover toe), and once that deformity is set in, it doesn't reverse on its own.

• Pain under the ball of the foot — a sharp or aching pain right under the base of the second toe (or occasionally the third), worst when pushing off.
• Feeling of walking on a lump — like there's a bunched-up sock or pebble under the ball of your foot.
• Toe drifting upward — the affected toe gradually rises off the ground and may start crossing over the big toe.
• Swelling at the base of the toe — puffiness on the underside of the foot right where the toe meets the ball.
• Pain worse barefoot on hard floors — the thin skin of the sole offers no cushion, and every step lands directly on the torn tissue.

Your provider does a dorsal drawer test — gently lifting the affected toe upward to feel how much it gives compared to the same toe on your other foot. An MRI is the most reliable test and grades how badly the plate is torn. Ultrasound is an alternative when read by an experienced sonographer. A weight-bearing X-ray (taken standing on the foot) shows whether the toe joint has started to drift out of place.

Higher-grade tears (where the plate is fully through) and toes that have already started crossing over need surgical repair. The operation stitches the torn plate back to its attachment and often combines with a small bone-shortening cut on the metatarsal to take final pressure off the joint.

External patient-education references and related OSI pages for additional background:

• Britannica — Ankle (anatomy)
• AAOS OrthoInfo — patient education library
• OSI glossary — orthopedic terminology in plain language