by the description u provided u seem to be suffering from a condition called corns. these are nothing but horny induration or callosity of the epidermis
with a central core, formed especially on the toes or feet and caused by undue pressure or friction.
general treatment for this is surgery in which this dead skin is scraped, but there is no guarantee given that there will be no recurrences. speaking from experience, i advise you to take homoeopathic treatment from a nearby homoeopath or take medicine antim crud 200 2 times a day for 15 days to completely be cured of it forever. u can get this medicine easily from any homoeopathic outlet. do let me know know after that.
hope this answers ur query, if u r satisfied by this answer please accept it,
Dr. Rooma Ramnani (firstname.lastname@example.org)