Food allergies occur when the body's immune system mistakenly identifies certain foods as harmful. This can lead to various symptoms, ranging from mild reactions like hives and stomach upset to severe reactions known as anaphylaxis, which can be life-threatening. Common allergens include peanuts, tree nuts, milk, eggs, wheat, soy, fish, and shellfish. People with food allergies must carefully avoid their trigger foods and read labels to prevent accidental exposure. Diagnosis typically involves allergy testing, and management often includes carrying an epinephrine auto-injector for emergencies. Education about food allergies is essential for those affected and their families.