I've been bit by recluse spiders but that never hurt. You usually don't realize you've been bit until the area swells up and the center of the bite starts to darken, dissolve and expand much later.
Do you have those little 1 inch scorpions in your area? They don't leave much of a welt, if any but you sure know it when they sting you and you do get numb. Sometimes you can carry them in on your shoes and find them later as they look for cover.
I wish our Scorpions were one inch. They are big and black. Some of them 6-7” including their tails. Kids like to catch them and cut the stinger off and play with them. If you are outside from June- November, you better have shoes on. They come out at night. Disgusting beasts.