False eyelash extensions itchy eyes can be caused by conjunctivitis, blepharitis, blepharitis and other diseases. 1. Conjunctivitis: Conjunctivitis is the cause of many diseases, such as bacteria, chlamydia, viruses and other pathogens infections, immune response. Patients mainly manifested as dry eyes, redness, itchy eyes, fear of light, etc., and there will be pain, increased secretion and other manifestations. Conjunctivitis can occur if the patient has a pathogen infection or is allergic to the material of the eyelashes or the glue used when attaching false eyelashes. 2. Blepharitis: Most blepharitis is caused by a bacterial infection, which can lead to fever, redness, swelling, pain, and itchy eyes. Blepharitis can occur if the patient has a bacterial infection from false eyelash extensions. 3. Blepharitis: the etiology of blepharitis is more complex, and it is currently believed that it may be related to systemic diseases such as atopic dermatitis and psoriasis, or it may be related to bacterial infection. The main symptoms of patients are eye congestion and redness, itching and stinging, as well as increased secretion, swelling and erosion. Patients can present with blepharitis if they have a history of related medical conditions or bacterial infections. Patients with symptoms of itchy eyes from false eyelash extensions should stop the extensions in time, and if the symptoms are not relieved, they should seek medical treatment in time.