This image shows a bony prominence on the top of the foot. The medical name for this bump is exostosis. They develop more often in people having a high arched foot than people having a flat foot. They usually occur on both feet but can occur on just one. They are not worrisome at all, unless you wear shoes that strangulate your foot in this area.
This means no lacing directly over the bump in running shoes and no buckles or decorative trim over the bump, which are often found in loafer style shoes.
Here’s an easy way to modify your running shoes if you have an exostosis on the top of your foot. Unlace to where the exostosis is and then skip the eyelets that would otherwise criss-cross over the prominence. You shoe will still fit secure and this will alleviate pressure that would otherwise cause pain.
Additional posts about top of the foot bump, may be found here: