well taking the biotin internally helps to thicken the hair as it grows out your scalp. I only take 1500mcg=1.5mg, so people take as much as 5000mg, check to see how much you are taking, look to see it its mcg or mg. It could be breaking you out because its detoxing your system. My first 2 weeks I got small blackheads (which I never get) but it went away after that.