Angioedema is swelling beneath the skin, often caused by allergic reactions, medications (e.g., ACE inhibitors), infections, or hereditary conditions. Triggers like stress, foods, or insect bites may worsen it. Symptoms include deep, painful swelling, typically around the face, throat, or extremities. Treatment involves identifying and avoiding triggers, using antihistamines or corticosteroids for allergic cases, and epinephrine for severe reactions. Hereditary angioedema requires specialized therapies like C1-inhibitor concentrates. The cephalexin capsules may be prescribed for secondary bacterial infections but aren’t a primary treatment. Consult a doctor for diagnosis and tailored management to prevent complications like airway obstruction.