White blisters on the tongue are very painful, usually there is a mucosal ulcer, this ulcer is mostly from the systemic immune deficiency caused by, may also be due to vitamin and trace element deficiency caused by, must pay attention to vitamin supplementation. You can choose to use 0.5% dacronin hydrochloride solution applied to the surface when you feel pain, which has the effect of rapid anesthesia and pain relief, or you can choose to use 2% lidocaine diluted for gargling before meals, which also has the effect of pain relief. You can choose medications to promote healing by using cidiodine tablets, one tablet three times a day, or you can choose compound cortical dispersion or cyanide dispersion or watermelon cream spray to promote healing. If the white blisters are large, you can choose to inject tretinoin suspension, or prednisolone suspension, etc. in the submucosal closure of the ulcer.