I would like to seek assistance with regard to my concern in skin. There is a pimple appearing in my arms and around my wrists. I am now using a sulfur soap. I am wondering why this happens. If the pimples were healed, it leaves marks that make my arm and wrists dark. I want to have normal skin. I was looking forward to take antibiotics but I do not know what to take. Please help. I will attach a photo of my arms for your look.