Needle eyes are also known as mydriasis and acute blepharitis. A long needle eye is primarily an acute inflammation caused by septic bacteria invading the eyelid glands, mostly due to Staphylococcus aureus infection when the patient has weakened resistance, malnutrition, or blepharitis, and can sometimes recur. Clinically, mydriasis (needle eye) is divided into two categories: external mydriasis and internal mydriasis, with the following symptoms: 1. External mydriasis: External mydriasis is an acute purulent inflammation of the sebaceous glands or follicles at the root of the patient’s eyelashes, and people with poor hygiene, weak constitution, or refractive error are susceptible to this disease. The patient’s eyelid is locally red, swollen, and congested, and a small, round, hard nodule may be palpable near the lid margin and may be painful to touch, accompanied by tearing, photophobia, and foreign body sensation. Although the inflammation is usually limited, the edema can be diffuse. If allowed to break down and drain pus on its own, it often causes sequelae such as eyelid deformation, ectropion, and incomplete closure of the upper and lower lid fissures due to scar contraction. 2. Internal mydriasis: This is an acute purulent inflammation of the patient’s lid gland with redness, pain, and swelling that is more limited, with a small yellow bulge on the conjunctival surface of the eyelid, after which an abscess can form, with a pus head on the conjunctival surface of the lid, and occasionally the abscess will penetrate the skin surface and the patient will feel pain. The main treatments for needle eye are as follows: 1. Early treatment: local hot towels can be used for wet and hot compresses for 10-15 minutes each time, 3-4 times a day, which can promote blood circulation and help inflammation dissipate; 2. Medication: patients can use antibiotic eye drops, commonly used oxyfloxacin eye drops, tobramycin eye drops, etc. Antibiotic eye ointment such as erythromycin can be used at night before bedtime. For recurrent episodes and those with systemic symptoms, oral antibiotics should be administered to control the infection; 3. Physical therapy: the use of ultrashort wave physical therapy can promote rapid absorption of infiltrates and hard nodules or dissipation of abscesses; 4. Surgical drainage of pus: this can promote healing and reduce local swelling and pain in the eyelid.