The first thing to do is to look for the cause of the blisters on the tongue. Generally speaking, if the diet is spicy or salty, it can lead to fire and thus blisters on the tongue, in addition to bacterial and viral infections, which can also lead to blisters on the tongue. The main thing is to drink more water, eat a lighter diet, and use a topical spray to reduce inflammation and fire. If the blisters on the tongue are caused by fire, usually pay attention to drink more water or soup to keep the skin moist. Avoid eating spicy and fried products, and eat more cool and nourishing vegetables and fruits. You can take zinc gluconate orally, or take vitamin B at the same time, usually drink more water and eat more vegetables.