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Angioedema is a condition marked by sudden swelling beneath the skin, often around the eyes, lips, throat, or limbs. It may result from allergic reactions, medications, or hereditary factors. Symptoms can be mild to life-threatening, especially if breathing is impacted. Common triggers include foods, insect stings, and drugs like ACE inhibitors. Prompt diagnosis and treatment are essential. Antihistamines, corticosteroids, or epinephrine may be used based on severity. Awareness of medication interactions, including antibiotics like cephalexin, is important. If you're a cephalexin supplier, understanding angioedema helps ensure safe usage and better communication with healthcare providers and patients.