Red dots and blisters
Erythema and blisters that don’t go away for a long time can be a sign of a serious condition. They are often associated with tongue cancer. You should see a doctor immediately.
Burning sensation of the tongue
It is most common in women going through menopause and is caused by significant hormonal changes, especially after the onset of menopause. You should see a doctor if you suffer from this problem.
Another reason could be using the wrong toothpaste: some people are allergic to certain ingredients.