6 weeks ago my wife walked across the lawn to go to the house next door... in her sandals. She got nailed big time... she’s still getting over it.
Ouch! Prayers for her recovery.
The crushed leaves and stems of the common garden annual flower “impatiens” instantly neutralizes the stings and prevents them from hurting or itching. I keep hanging baskets of those things all over the place for just that reason, but they do require regular watering. Also works on scorpion, spider and wasp stings but takes a little longer. Still, better than the drug store ointments and sprays, lasts much longer if applied while the stings are still open. If there’s a scab you have to scratch it open and rub the juice in but you will only need to use it once per welt.
The native version of the same plant, jewel weed /touch-me-not, grows near poison ivy patches and it is useful for treating that, too. It bears pods full of seeds and the pods spring open on the slightest contact, flinging the seeds far and wide, so once you get it going you will have it around a long time, and the hummingbirds will thank you.