Patients with itchy eyes in summer may be related to allergic keratitis, and may also be caused by dry eye, blepharitis and other diseases. 1. Allergic keratitis: Allergic patients exposed to allergens, such as dust mites, dust, animal fur, pollen, etc. in the summer, can cause an allergic reaction, resulting in itchy, dry eyes and other uncomfortable symptoms, which may also be accompanied by eye redness. 2. Dry eye: dry eye patients with tear film instability, when the eye surface is damaged, eye discomfort can occur, which can cause itchy eyes, the summer weather is hotter, the patient’s discomfort may be significantly aggravated. 3. Blepharitis: Blepharitis is a subacute or chronic inflammation of the skin of the eyelid margins, eyelash follicles and their glands, which can cause itchy, red eyes and other symptoms, and in the summer, when the weather is hot, the patient’s discomfort may be more obvious. It is recommended that patients with itchy eyes in the summer should consult a doctor to evaluate their condition and follow the doctor’s instructions for treatment.