Using the Scalp Wellness Shampoo really helped me when I came down with a case of shingles that appeared on my face/hairline. It never blistered and the doctor was surprised since I had severe headaches, but none of the blistering or related problems. It was also very short lived and I truly feel that the Malibu C scalp treatments and shampoo/conditioner saved me from the blistering and scarring.