The main symptoms of a blocked lid gland are dry eyes, astringent eyes, and stinging eyes. The lid gland is the main source of oil-like tears in human tears, and if the lid gland is blocked, there will be less oil-like tears, which can lead to uneven distribution of tears, changes in properties, and strong evaporation of tears, thus causing symptoms of dry eye. For example, many young people like to stay up late, get tired, and use electronic products such as cell phones, tablets, and computers too much, which can cause the lid glands to secrete abnormally, and when they do, the oil at the mouth of the lid gland can solidify and block the mouth of the lid gland, causing various symptoms of lid gland blockage.