navy blue items of the formal occasions to wear

All my nurse/doctor friends I could use some help my fiancé was stung early yesterday morning by a wasp when he woke up this morning his hand is twice it's normal size and red it's now the afternoon and the swelling has not went down nor the redness, any advice on how to make his swelling go down and the redness go away ? Any advice is much appreciated ! navy blue items of the formal occasions to wear