The eyelids are the upper and lower eyelids, so the inner eyelids are the inside of the upper and lower eyelids. The eyelid is divided into 5 layers from the outside in, and the inner eyelid is the lid conjunctiva, a thin and clear layer of mucosal tissue that covers the top of the eye and provides protection and lubrication to the eyeball. Because the eyelid skin is thin and the subcutaneous tissue is lax, swelling can occur due to minor water retention or bleeding, especially when it corresponds to diseases such as lid infections and kidney inflammation that are often accompanied by eyelid edema. There are abundant muscles and nerves on the inner side of the eyelid, so when eyelashes are accidentally dislodged into the eyelid, or foreign objects such as sand or hair enter the eyelid, this can cause severe pain within the eyelid, which can trigger repeated blinking movements, while stimulating the lacrimal sac to produce tears and facilitate the discharge of the foreign object, preventing it from rubbing against the conjunctiva. A small hole on the inner side of the upper and lower margins of the eyelid is a tear point that secretes a small amount of tears on a daily basis, which is evenly distributed on the inner side of the eyelid through the blinking action to keep the surface of the eye moist enough to prevent dryness and discomfort. Also when there is foreign body intrusion, such as rain or dust storms, the eyes are protected from external damage by the reflex of closing the eyes within the eyelids. In addition, since the skin tissue within the eyelid is single and prone to bacterial infection, it is advisable to avoid wiping the eye locally with your hands or unclean objects on a daily basis to avoid local inflammation such as blepharitis and blephar gland cysts. In daily life, attention should be paid to maintaining good eye habits, avoiding long hours of work and reading, and looking at more greenery or applying hot compresses to the eyes to relieve eye fatigue.