Hypothyroid, pcos and vitiligo. Curable?

My wife is having thyroid and pcos and she is taking treatment for the same ( neurobin forte , diane 35, tayo60 and thyronorm 75mcg) but recently she observed small white patches near nose and 2-3 very small patches in under armpits ..local dermatologist said that it's start of vitiligo by checking the spot using ultraviolet rays . Does thyroid cause vitiligo ? Is it curable? The doctor gave Melgain lotion , Tackon forte onitment and zempred 16 ) tablet. But due to her ongoing treatment on thyroid and pcos Gynecologist suggested not to take the zempred 16 tablet as it can affect the periods and treatment. Now her thyroid is in normal (1.18 range ) so will that vitiligo get resolved by these onitment and Melgain lotion or it will worsen the situation if she doesn't take the steroids like zempred 16 Her LH-FSH-Prolactin and Testosterone levels are Little increased. But thyroid is normal.. Will this thing remain life long or is it completely curable?