What happens if you leave a yellow jacket sting untreated?

What happens if you leave a yellow jacket sting untreated? If you leave a yellow jacket sting untreated, for most non-allergic people, sting will still heal on its own within few hours to few days, with pain, redness, swelling, and itching gradually subsiding. However, without cleaning, risk of secondary bacterial infection increases from scratching or dirt, leading to increased swelling, warmth, pus, and prolonged healing. Without cold compress and antihistamine, swelling and itching may be more uncomfortable and last longer. For allergic individuals, leaving sting untreated can be dangerous, as anaphylaxis can progress quickly without epinephrine and emergency care, leading to breathing difficulty, drop in blood pressure, and potentially fatal outcome. For multiple stings, large venom load can cause systemic reaction. So for mild sting, untreated may still resolve but be more uncomfortable and risk infection, while for allergic or multiple stings, untreated can be serious and life-threatening, requiring medical attention.