(1) Etiology and pathogenesis The eyelid gland is located in the deep part of the eyelid, but it opens at the eyelid margin. Bacteria (mainly staphylococci) can enter the sebaceous gland at the root of eyelashes or the meibomian gland in the deep eyelid from the opening and cause acute suppurative inflammation. The former is called external stye and the latter is called internal stye. Healthy people's eyelids have strong defense ability, which can resist the invasion of external bacteria, but when the body's resistance is weakened (such as malnutrition, lack of sleep or diabetes, etc.). ), it is easy to get sick. Suffering from facial limbitis, trachoma, chronic conjunctivitis or eye diseases such as overuse, myopia, hyperopia, astigmatism, etc., can also occur when glasses are not fitted in time and eyes are tired. If you don't pay attention to eye hygiene, wipe your eyes with unclean hands, towels, handkerchiefs, etc. And bacteria invade eyelid glands, which will directly cause sty.
(2) What is a sty? The patient's performance is 1. External palpebral adenitis: also known as facial marginal furuncle, the eyelid is red, swollen and painful at first; The induration can be touched near the edge of the face, with obvious tenderness. After a few days, the induration becomes soft and suppurative, and yellow and white pus heads appear near the root of eyelashes. After the pus head is broken, the pus is discharged, the redness and swelling quickly subside, and the pain is relieved. If the virulence of pathogenic bacteria is serious or the body's resistance to pathogenic bacteria is reduced, inflammation spreads from one gland to other glands, forming multiple pus spots, eyelid is highly red and swollen, adjacent bulbar conjunctiva is edema, and preauricular lymph nodes are swollen. Young children, the elderly and the infirm may even have symptoms such as chills and fever.
2. Internal sty: The patient's symptoms are the same as external sty. However, because the infected meibomian gland is located in the solid meibomian tissue, eyelid swelling is not as obvious as external meibomitis, but the patient feels severe pain and inflammation takes a long time. The opening of the meibomian gland with early inflammation was congested and swollen. A few days later, a yellow pus head was faintly visible on the eyelid conjunctiva, and finally it penetrated the eyelid conjunctiva and discharged pus into the conjunctival sac.