Talk to Dermatologist on Skin Discoloration On Forehead

I have been noticing light colour patches on my forehead. I kept ignoring that it will get better on its in. But it didn't. Recently I have been diagnosed with Autoimmune Thyroid Disease (Hashimoto's thyroiditis). I was studying about it and came to know that it can trigger other autoimmune condition, including vitiligo. Now I am concerned that are these light coloured patches, some initial stage of vitiligo or it is something else. I want to consult it with some specialist. But I don't know, where I can find some specific doctor for that in Lahore. Please help.