No. Basal cell carcinoma is characterized by open lesions that ooze and crust. I went to the skin cancer center and had it biopsied. It was positive as basal cell carcinoma and it was surgically removed using mohs sectioning. The original tumor was verified as gone but it had already spread as a result of the biopsy.
It would be an error to put both electrodes against any problem area. The negative electrode actually protects the area around it so it should be kept as remote as possible (hand or foot). The positive electrode is active and is the one that has the positive effects.
I did place the positive electrode (wrapped in a salt water soaked paper towel) directly over the lesion.