Blisters on the tongue are generally considered to be internal heat, and their positions and meanings are different. Blisters on the tip of the tongue are generally considered to be heart fire. However, from the perspective of modern medicine, this is the result of the replication of herpes virus lurking in nerve cells under the condition of immune fluctuation, and it can heal itself within 7- 10 days. Eat more fruits and vegetables. Large doses of vitamin C (250-500mg/day) can also relieve symptoms.