Upper eyelids can puff up and swell either at night or throughout the day for a variety of reasons, such as hyperthyroidism, chalazion, bacterial infections, viral infection and mumps, says Healthgrades. Chalazion occurs when the oil glands in the eyelids are blocked, resulting in swelling and puffiness.
Eyelids can become puffy and swollen due to a multitude of infections, such as conjunctivitis, blepharitis, cellulitis, dacryocystitis and orbital cellulitis, states Healthgrades. Blepharitis occurs when an eyelash follicle becomes infected, while a skin infection causes cellulitis and orbital cellulitis. When an oil gland becomes infected, a stye results. Treatments of these problems include antibiotics and steroid regimens, Healthline explains.
Eyelid swelling can also be a result of an allergy to insect bites, drugs or hay fever, according to Healthgrades. Trauma can cause puffiness. Swelling occurs naturally after any type of eye or facial surgery as well as after an injury. In some cases, eyelid swelling is a symptom of another problem, such as hyperthyroidism, hypothyroidism, kidney disorders and organ failure. A person experiencing eyelid swelling needs to consult a medical professional right away if the symptoms persist and include bleeding and discharge from the eye, sensitivity to light, pus-filled sores and vision problems.