Rub squished up jewelweed stems & leaves on the area and hold them there for a moment until the pain goes away — jewelweed works faster than any commercial topical stuff against pain and itching, including poison ivy. The spot won’t swell up or be red for long. Jewelweed grows along creeks in the Ozarks- often conveniently where poison ivy is- and has small funny-looking orange flowers that hang on tiny threadlike stalks. Hummingbirds go crazy for them. The seed pods, when touched, spring open and fling seeds several feet from the plant. If you don’t have jewelweed around when you need it, you can find a close relative in any store’s garden department called ‘impatiens’ — impatiens work almost as well and it’s worth keeping a few pots of them around the yard especially in fire ant country.
I was stung by a scorpion here in the Ozarks, walking in a barn door, it dropped down and hammered me on the upper shoulder on the back, felt like a 2x4 with a nail in it. Ir knocked me down, I am not kidding.
Had an exquisitely painful red spot, and it did take about a month to heal. Very sore muscles, until it did.