Sesamoid pain occurs under the big toe joint. The sesamoid bones are 2 small pebble bones that form part of the joint. In some cases, the bones can become inflamed or develop a fracture. It usually occurs with repetitive stress/pressure or can be from landing heavily on the foot.
Management is usually using a combination of padding, orthotics and sometimes using a fracture boot.
Very occasionally, so long as there is no fracture and it does not settle with conservative measures, injections might be considered and very rarely surgery to remove the sesamoid is required.