Small very  hard with a small horn like growth in its centre very painful if touched.I treated it with Efudix Iwas prescribed for a small skin cancer on my left foot & it was successful for that but so far not for this one has notresponded . Could otocomb ointment be tried ?
HIT hank for asking to ChatDoctorI can understand your concern if this is really skin cancer then chemotherapy and radiation therapy would be needed, and this all depends upon the type of skin malignancy, I don't think so that Outcome will work here, hope this information helps you have good day