A bee sting occurs when a bee injects venom into the skin using its stinger. This usually happens when a bee feels threatened or is protecting its hive. The venom contains proteins that can cause pain, swelling, and redness at the sting site. Most people experience mild reactions, but some may have more severe allergic reactions. After a sting, it’s important to remove the stinger quickly to reduce venom exposure. Common treatments include washing the area, applying ice, and taking over-the-counter pain relievers. In rare cases, a bee sting can trigger anaphylaxis, a serious allergic reaction that requires immediate medical attention.