I know the feeling. I always take hydrogen peroxide fishing with me if I get finned or I’ll just pour some coca cola on it if I get stabbed by a fin. It usually happens when they’re flopping in the bottom of the boat while trying to pick them up and throw em in the cooler.
Next time bring a hemorrhoid cream with you, will stop the sting immediately.
When fishing in the Gulf, we always threw the hardhead cats back - but yeah, getting them off the hook is when the trouble starts. Once, I had one flip upside down and shake off of the hook as I was reaching for it - he fell inverted and stuck me in the outside of my calf. Made a real bloody mess out of the boat.