I have iron and vitamin B deficiencies. If I forget to take my vitamin and iron supplements, I start getting a red, slightly inflamed tongue.
It was first misdiagnosed as strawberry tongue but the tests my doctor asked for showed that I have vitamin deficiencies. My doctor was surprised because inflammation is usually not seen in these cases. It doesn't get extremely inflamed like it does with strawberry tongue, but it is visibly raised.
The redness goes away completely if I take my supplements regularly.