I had a raised mole on my forehead, and I removed that with apple cider vinegar application. it worked! After the scab fell down there was pale and whitish skin underneath but very soon that area turned black, why did it happen? And most importantly how can I get rid of it? Please help! currently I am applying apple cider vinegar on the spot again, out of the thinking that it might be some remnant of the past mole. And I don't know whether it will work or not!