Itchy eyes with contact lenses are related to physiological factors such as wearing contact lenses for too long, choosing inappropriate contact lenses, and also considered to be related to allergic conjunctivitis, contact keratitis, and so on. 1. Physiological factors: if the crowd wear contact lenses for a long time, choose the size of the contact lens is not suitable, eye over-sensitivity, etc., can cause contact lens eye itching phenomenon. 2. Allergic conjunctivitis: if the patient is allergic to contact lenses, contact lens solution, may cause contact lens eye itching. Some patients also have allergic conjunctivitis caused by pollen, animal hair, etc., which can be manifested as redness of the white eyeballs, burning sensation in the eyes, tearing, increase in eye secretion, eyelid swelling and so on. 3. Contact keratitis: contact keratitis can also cause itchy eyes in some patients wearing contact lenses. Contact keratitis is associated with microbial invasion and infection, low immunity, corneal abrasion, etc. Patients are also susceptible to photophobia, tearing, blepharospasm, eye pain, vision loss, blurred vision and other symptoms. It is recommended that contact lens wearers with itchy eyes should first stop wearing contact lenses, consult a doctor for examination, and follow the doctor’s instructions for treatment after clarifying the cause of the disease. Pay attention to the selection of suitable contact lenses, and pay attention to daily eye hygiene.