3. The black tongue
The papillae on the epithelium of the tongue muscle are known to grow throughout the lifetime. But an unusually lengthy growth of such hairy projections can be more susceptible to bacteria making your tongue black in colour. Hence good and regular dental hygiene is recommended to prevent such conditions. Black tongue is also seen in diabetic or cancer patients undergoing chemotherapy.
The abnormally uneven texture of the tongue Apart from unknowingly biting your tongue or blistering it by having something really hot, if your tongue looks bumpy or blistered then you simply need to consult a doctor. As it can be an indication of ulcer, cancer, or fungal spores.