Raw eye stitches, also known as mydriasis, are purulent inflammation of the eyelids and their accessory glands, mainly due to bacterial infection. The reason for this is that bacteria are normal parasites in the human eye and face, and only cause infection if the eye resistance is reduced or if the local skin barrier is broken, so the cause is mainly a decrease in one’s own resistance. For example, some people often stay up late, do not rest well or often overuse their eyes, overuse tablet phones and computers, poor local health of the eyes, reduced tear secretion and swollen eyelids can lead to bacteria taking advantage of the opportunity to cause septic inflammation of the eyelids and wheals. The most important way to prevent recurrence is to live a healthy life and use your eyes in a healthy way.