I don't know about the pigmentation but nothing would suprise me.
My skin is what started me taking the anti-biotics in the first place. I have been off them since Oct. last year and at first my skin was not too bad. Probably because they were still in my system. Now that I have begun the candida treatment my skin is awful. Terrible eczema type dermatitis red rash that alternates between scaley and dry and white headed blistery pimple like bumps all over my chin around my nose and mouth. I feel like a leper. Nothing I do helps. I know it is related to the candida and my food sensitivities from the leaky gut.
I think the candida can do many many things to your body. We are all so different and it seems to maybe attack those areas of our body where we have our individual weaknesses. I know I have always had a sensitive stomach and that is where the candida has hit me along with the skin and there is in addition to my own skin problems lengthy history of skin issues on my mom's side of the family quite a few have taken accutane in fact. All I can say is that I am thankful I never took that at least.