Brief Answer: Callus/corns Detailed Answer: Hi and thank you so much for this query. I have reviewed the attached image. It is suggestive of a callus. This often results from repeated friction to this part of the body. My advice would be to meet a dermatologist/podiatrist who would prescribe drugs(containing salicyclic acid) that can dissolve the thick layer and restore the health of your foot especially the right toe. You can obtain some more information from this trusted page. http://www.mayoclinic.org/diseases-conditions/corns-and-calluses/basics/definition/con-0000?p=1 I hope this helps. I wish you well and feel free to ask for more information and clarification if need be. Thanks! Dr. Ditah, MD.