I was treating a wart near the tip of my middle finger with a cvs brand wart remover strips. It contaims 40% salicylic acid. On my third day I had this terrible burning and throbbing sensation that I endured for the whole day. I decided to remove it at night of the fourth day, because it was already too painful for me to endure. It was swollen, and white at the top, and dark underneath. When I woke up the color of the skin on my finger turned dark brown. It was less swollen but still painful.
How do I treat this?