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 can cause pain, swelling, and redness at the sting site. Most people experience mild symptoms, but some may have allergic reactions. In cases of severe allergic reactions, known as anaphylaxis, symptoms can include difficulty breathing, swelling of the face or throat, and rapid heartbeat. It is important to seek medical attention immediately if these symptoms occur. For minor stings, home remedies like ice packs can help reduce discomfort.