Hi Dear,
Welcome to Health Care Magic Team.
Understanding your concern.
Dark patches on the roof of mouth and other areas of mouth are a condition which could be because of excessive
melanin secretion in body and this is very normal occurrence. These patches are called oral melanotic macules.
Probable chances are there that you would have amalgam filling in your mouth due to which such tattoos form on roof of mouth known as amalgam tattoo.
But if these pigments becoming red and causing difficulty in swallowing, eating and causing any itchy and burning sensation then it could be a condition which you need to worry about. It could be because of systemic conditions then.
You should visit your nearby
dentist just to make sure that these areas are not because of any serious mouth pathology rather just because of hyper pigmentation. Dentist will take a sample from dark pigmented area and will do
biopsy for the same to find exact diagnosis and then treatment can be done accordingly.
Hope your concern has been resolved.
Best Wishes,
Dr. Harry Maheshwari