Hands treated with silver nitrate
Dr Andy Jordan's photographs of a patient's failed bid to self-treat
This initially rather alarming appearance is due to silver nitrate cautery applied by the patient to her hand warts. She had become frightened with the black appearance and had stopped using the silver nitrate before consulting.
I suggested she allowed the dead material to slough off and then apply salicylic acid carefully to any remaining warts, ensuring the caustic fluid did not spread to surrounding skin.