Thanks for posting your query at DoctorSpring.com
I can understand your concern. I reviewed the picture.
Its a dermatofibroma which is a skin tumour which is benign.
The treatment for it would be excision by your doctor. It may in rare cases turn malignant hence its best to visit your doctor to get it excised. After excision it can be sent to be examined under the microscope.
Please let me know if you have any queries.
Patient replied :
Are you sure it is harmless?
How quick can it be removed clinacilly?
Thanks for your reply.
At present it seems harmless but as I mentioned it could turn malignant in rare cases.
It can be excised in an hour by an experienced doctor. It can be sent for testing.