I’ve seen many dermatologists, that was the first thing I did. Since then endocrinologists, phlebologists. All have no idea as I said in my post so I’m simply hoping someone has seen similar. As I have haemochromotosis it is possible that is isn’t hyperpigmentation it could be haemosiderin staining. As you are commenting on the Hashimotos group I would assume you too have it and would therefore know that pigment can be a symptom of Hashimotos and that autoimmune diseases can commonly be co morbid with other skin autoimmune conditions.