Ocular edema includes both physiologic and pathologic factors. Ocular edema, also known as eyelid edema. Since the eyelid skin is the thinnest and the subcutaneous tissue is also lax, it is easy to cause the fluid to spread outward, resulting in edema. 1. Physiological factors: often caused by sleeping with the head too low at night, drinking too much water before going to bed, not enough sleep, etc. It can also occur in healthy people. Correcting the above mentioned habits will make the edema disappear. 2. Pathologic factors: Inflammation, systemic diseases and other causes. (1) Inflammation: including blepharitis, eyelid abscess, acute conjunctivitis, endophthalmitis, etc., which may be triggered by bacterial infections, and may be characterized by redness, swelling, heat, and pain when the symptoms of eye edema appear. (2) Systemic diseases: including kidney disease, heart disease, anemia, malnutrition, etc., which may lead to systemic edema including ocular edema, as opposed to inflammatory, with white, bright, painless skin, and requiring treatment of the primary disease. When edema is considered to be caused by pathological factors, it is recommended to go to the hospital to clarify the original disease; physiological edema needs no special treatment.