A sore, swollen eyelid is one of the most common presenting complaints at a primary care doctor's office. In addition to feeling self-conscious about their appearance, patients with a sore swollen eyelid will worry that they might have an infection and will be concerned about loss of vision.

Children often have swollen eyelids, commonly caused by trauma, infection and allergies. Because these conditions can be serious, consult your child's pediatrician for an accurate diagnosis and treatment plan to avoid damage to your child's eye or vision.

A food allergy is a mistake of the immune system, according to Kids Health. The immune system protects the body from harmful substances, such as viruses and bacteria. During a food allergy reaction, the immune system mistakes the food as a harmful substance and attempts to fight it off.

The eyelids, or palpebrae, have some of the thinnest skin of the body and serve to protect the eyes. The eyelashes also protect the eyes from sweat, dust and debris. Secretions such as tears keep the eyes moist. Infections and inflammation can occur within the skin and glands of the eyelids, leading to swelling.