what is the bump on the outside of foot
Please choose PRINT from your browser menu. Close Window. Lumps and Bumps on the Outside of the Foot. Written By: Dr. Kirk A. Koepsel, D.P.M. Description. There are a few causes of lumps, bumps or prominence on the outside of the foot. Some of these are just normal anatomy; others are due to abnormal processes. Starting from the fifth toe and working back to the heel: A common prominence on the fifth toe is due to the formation of a hammertoe.