Understanding the Context

Although they’re called “sesamoid,” these bones are not related to sesame seeds. Instead, they are tiny, sesame-like structures found in certain joints—specifically at the base of the big toe, embedded inside the tendons that connect the toe muscles to the foot bones. There are two sesamoid bones in each foot, one on each side of the big toe joint.

Their primary role is to protect the tendons from friction and help with toe flexion and extension, supporting balance, propulsion, and weight distribution during walking or running.

Common Symptoms of Sesamoid Bone Issues

Pain from sesamoid bones often feels localized under the metatarsophalangeal joint (where the toe meets the foot). You might notice:

Key Insights

• Sharp, burning, or throbbing pain underneath the big toe
  - Difficulty pushing off the ground while walking or running
  - Swelling or bruising in the affected area
  - Pain that worsens with activity or wearing tight, narrow footwear
  - A tendency to limp or favor one foot over the other

Since these symptoms overlap with other common foot conditions like bunions, Morton’s neuroma, or stress fractures, accurate diagnosis often requires a healthcare evaluation.

What Causes Sesamoid Bone Pain?

Several factors can strain these tiny bones and surrounding tissues:

• Repetitive stress: Activities like running, dancing, or wearing high heels increase pressure
  - Overuse injuries: Frequent standing or jumping
  - Existing foot deformities: Conditions like high arches or flat feet alter weight distribution
  - Trauma: A direct blow to the toe can displace or damage the sesamoid
  - Medical conditions: Turf toe or inflammatory diseases like arthritis may contribute

Final Thoughts

How Is Sesamoid Pain Diagnosed?

Because sesamoid bones are not visible on ordinary X-rays in some cases, diagnosis may involve:

• A detailed history of symptoms and activity
  - Physical examination, including pressure tests
  - Imaging tests such as X-rays, MRI, or even CT scans to visualize bone alignment and soft tissue

Early detection prevents worsening symptoms and preserves mobility.

Treatment Options for Sesamoid Bone Pain

The good news is, most sesamoid bone pain is treatable without surgery. Common approaches include: