What is Sesamoiditis?

Sesamoiditis is a condition that causes pain in the ball of the foot, at the base of the big toe. It’s particularly common amongst people who spend lots of time of the ball of their feet, such as runners and athletes.

The sesamoid is two small bones positioned underneath the big toe joint. While it’s tiny compared to the rest of the foot’s skeletal structure, it plays a crucial role in stabalising the inside of our feet as we shift our weight as we walk or run. It also helps stabilise our body as we take off for a jump and helps protect the tendons from the pressure of our weight.

Sesamoiditis is an overuse injury involving chronic inflammation of the sesamoid bones and surrounding tendons. Individuals who engage in sports that require a lot of footwork often suffer from inflammation of the sesamoid. However, poorly fitted footwear may also cause sesamoiditis.