DS is 6. He got stung by what he thinks was a bee in S France last week. We didn't see the insect, there was a drop of blood on his finger, no visible sting to remove.
Although it hurt a lot he didn't react (physically) much at all, but now 9 days later his finger has been swelling throughout the day and is too painful to straighten properly. It is white around the site of the sting, red beyond that, and the swelling has started to spread beyond his knuckles. There are tiny bumps like blisters directly on the site of the sting.
He is quite well in himself, and the swelling isn't particularly rapid, I'd say throughout today really.