I'm not exactly sure how to explain this but my boyfriend held up a stand of my hair to the light. He says it has different transparency along the shaft. It looks dark brown and then lighter almost white in some spots. I'm not sure what this is. We pulled another strand and the same thing. He says heat damage but I haven't used heat in months. I am relaxed and we both think this could be a reason. Has anyone ever heard of this or know what this might be.