Swelling occurs when a bee stings due to the bee injecting toxins into the body, which is usually treated with medication. When a bee stings a person, it injects venom into the body through its stinger. The main components of the venom are hydrochloric acid, anthranilic acid, and other acids, which can irritate the skin, resulting in swelling. When a patient is stung by a bee, he or she should be disinfected immediately by pulling out the venomous stinger, which can be cleaned with soapy water, and continuously rinsing the lesion with water. Anti-inflammatory and antiseptic medications such as compound dexamethasone acetate cream should also be applied to treat the area and prevent infection from occurring. Patients who have been stung by bees should use medication as prescribed by their doctor and seek medical attention to treat the lesions in a timely manner to avoid serious consequences.