How do eyes get edema in the morning?

Eye edema is divided into inflammatory and non-inflammatory. Inflammatory eye edema is normally caused by eye diseases, such as sinusitis, eyelid furuncle, erysipelas, subcutaneous cellulitis, acute dacryocystitis, conjunctivitis, keratitis, and is mainly treated for the cause. Non-inflammatory edema includes allergic eyelid dermatitis and eyelid edema secondary to systemic diseases, such as cardiac insufficiency, acute and chronic kidney disease, and hypothyroidism, requiring treatment for the primary disease. In addition, drinking too much water before going to bed, staying up late, using too much eyes, too low pillows, etc. can cause morning eye edema, mainly to adjust their work and rest rules, to maintain good living habits.