It is not from outside. It's clean from outside. If we touch and press it will be very painful. It is almost downside to fingers, but exactly touches ground while walking. Throughly checked for any sharpen pieces stocked their, but no result.

Suggestions offered by doctors on Lybrate are of advisory nature i.e., for educational and informational purposes only. Content posted on, created for, or compiled by Lybrate is not intended or designed to replace your doctor's independent judgment about any symptom, condition, or the appropriateness or risks of a procedure or treatment for a given person.