A 12-year-old child waking up in the morning with swollen bags under the eyes may be caused by trauma, lack of sleep, eye allergies and other factors. 1. Eye trauma: If the patient’s lower eyelid is traumatized, it can cause tissue fluid to ooze out and accumulate in the tissue space, so the child may wake up in the morning with symptoms of swollen lower eyelids, similar to bags under the eyes. 2. Lack of sleep: 12-year-olds who go to bed late at night, get up late at night, and wake up early in the morning can lead to poor blood circulation around the child’s eyes and bruising of the tissues, which can lead to the child’s swollen eyes. 3. Eye allergy: If the child is allergic, sleeping, allergic to the duvet cover, pillowcase, etc., the eye allergic reaction, the child may also have swollen eyes. It is recommended that children with obvious eye swelling consult a doctor in time to assess their condition and follow the doctor’s instructions for treatment. Children should also adopt a regular routine and get enough sleep to improve eye swelling.