What I have learned is that it is an auto-immune disease that affects different parts of the body. Generalized hits the whole body and segmental is one area of the body. It is also hereditary. I do not think is related to the Thyroid. I have not read anything about it being a fungus. Hope this helps.

There is a similar disease that is yeast related but it is not Vitiligo- Tinea Versicolor also has white patches - I was also researching Melanocytes and how to nourish them to produce more pigment - but only came across the normal antioxidant advise vitamins C etc…- I didn’t realize in India Vitiligo can impair a young woman from getting married - then once married if it appears is cause for divorce - that’s very archaic that something uncontrollable can have such devastating effects on families- very shallow thinking and sad - we have come along way and still need more progress

Vitiligo is an auto-immune disease. Yes of course Hypo Thyroid problems increases vitiligo. It is better to take proper treatment of Thyroid problem. And above all Stress...it makes vitiligo worse. The best way is to keep balanced lifestyle and positive mindset.
I also had Hypo Thyroid problem but after taking treatment it also helped in recovering Vitiligo.

No fungus at all, that doctor has no idea of what is talking about. It is, though, related to thyroid disorder, as most of the autoimmune disorders come in pairs. In my case these are vitiligo + hashimoto hypothiroidism, for which I medicated for years. I don't medicate for my vitiligo because I love the way I look and I evolve.