Igloo is a hormonal drug that is mainly used for mouth ulcers type of diseases. The clinical manifestations of mouth ulcers are redness, swelling, concave pain and painful ulcer attacks. They can be relieved with a topical pain relieving film on the affected area of the mouth, such as Icoderma. Yi Ke paste is white on one side and yellow on the other, when used can be dipped in a small amount of water, hold the yellow part, and then put the white part of the paste in the ulcer surface, press and hold for about 20 seconds, so that the drug is completely adhered to the affected area, and at the same time, pay attention to do not eat spicy and stimulating food.