Why are my eyes swollen when I wake up in the morning?

You may experience puffy eyes upon waking up in the morning due to several possible reasons: 1. **Excessive fatigue**: Prolonged watching of television, use of electronic devices, or staying up late working can lead to eye muscle fatigue and result in periorbital edema. 2. **Excessive water intake**: Drinking too much water, especially before bedtime, may cause fluid accumulation in the body, leading to swelling around the eyes. 3. **Allergic reaction**: Allergies to certain foods, pollen, dust mites, etc., may cause allergic eyelid swelling, often accompanied by symptoms such as sneezing and runny nose. 4. **Eye infection**: Conditions such as conjunctivitis or blepharitis can cause redness, swelling, and increased secretions in the eyes. 5. **Kidney problems**: Chronic kidney disease or acute kidney failure may impair the body's ability to excrete fluids, causing generalized edema including periorbital swelling. If the swelling persists or is accompanied by other symptoms such as pain, vision loss, or color changes, you should seek medical attention promptly.