Folic acid or vitamin B12 deficiency can cause your tongue ... Signs like a red, smooth, black, or sore tongue and bumps or soreness may be signs of several infections and illnesses.

as the tiny bumps on the tongue that contain the taste buds stretch out and disappear. Mouth ulcers are also a potential symptom. Those who don't get enough B12 can develop anaemia, and an ...

The tongue is covered in lots of little bumps. On the walls and grooves of these bumps are thousands of tiny taste buds, too small for the human eye to see. The buds sense the taste of everything ...