I've been stung 3 times by scorpions, 1 of which put me in hospital, once by a centipede and countless times by wasps and bees. Fortunately I've never experienced a hornet sting. I've heard they can make your eyes water a bit.
In the case of the scorpion sting that put me in the Esnaf, I'll always be very grateful to the 2 doctors and 5 nurses that sorted me out with half a dozen injections and comforting words. All for the paltry sum of 85TL.