I got tongue problem. partial pain, color change, partial rash, also surface of tongue became flat and don't get any better in 1 month for now.

See Dentist: It sounds as if it might be a yeast infection called candidiasis that is common, associated with stress and easily treated. However, there isn't enough information to help you - like what color is it now, do you smoke, where is the pain, when does it hurt, where is the rash. It could be any number of things and your dentist should be able to help you regardless

See a dentist: They have combined expertise in histopathologic diagnosis, clinical diagnosis and treatment of the tongue problems. Fortunately, the majority of tongue problems are not serious and most can be resolved quickly, but you can not ignore the symptoms.