Angioedema is swelling beneath the skin caused by an allergic reaction, infection, or certain medications. It often affects the face, lips, throat, or extremities. Common causes include food allergies (nuts, shellfish), drug reactions (ACE inhibitors, antibiotics), insect stings, or hereditary factors. Preventing angioedema involves avoiding known triggers, managing allergies, and informing healthcare providers about drug sensitivities. Patients should carry antihistamines or epinephrine if prescribed. In cases linked to medications, doctors may recommend alternatives. For those seeking reliable pharmaceutical sources, cephalexin capsules distributors provide essential antibiotics, but patients must use them cautiously under medical supervision to reduce risk of allergic reactions.