I have been allergic to mango twice. I went to the drugstore to buy loratadine tablets, take one pill a day, and then add some vitamins. I bought a piracetam (ointment) and applied it three times a day. It won't itch, and the swelling will go down a lot. Generally, it will be fine in four or five days. Don't be nervous. If you go to the hospital, the doctor will definitely ask you to hang up the water for three days. I only became allergic last month, hehe.