Hello. Welcome to hcm
When we are stung by insects,it contains toxins which our body cannot tolerete. So our defences try to remove it. In that process we get fever
. Sometimes toxin might be too strong and we go for anaphylaxis
. Only benadry wil not work. Your husband needs injections and has to be managed in hospital. I advice you to take him to hospital immedietly.
All the best