A wasp sting occurs when a wasp injects venom through its stinger, which is a sharp, pointed structure at the end of its abdomen. This venom can cause pain, swelling, and redness at the sting site. The severity of the reaction varies from person to person, with some experiencing mild discomfort while others may have more intense symptoms. In some cases, individuals may have an allergic reaction to a wasp sting, leading to symptoms such as difficulty breathing, swelling of the face or throat, and rapid heartbeat. This condition, known as anaphylaxis, requires immediate medical attention.