The redness of the patient’s eyes and the obvious foreign body sensation may be caused by eye trauma, visual fatigue, foreign body stimulation, infection, allergy and other factors. 1. Trauma: If the patient’s eyes are stimulated by external force, it may cause the capillaries of the conjunctiva to become congested, thus leading to redness of the eyes and the discomfort of foreign body sensation. 2. Foreign body: Inverted eyelashes, dust, insects and other foreign body stimulation can also lead to redness and foreign body sensation in the patient’s eyes. 3. Infection: If the patient’s eyelids are infected by bacteria, viruses, Chlamydia trachomatis and other pathogens, it can cause conjunctivitis, keratitis, blepharitis and other eye eye, which can also cause the patient’s eyes redness, edema, foreign body sensation and other discomforts. 4. Allergy: allergic children contact hair, pollen and other allergens, can lead to allergic conjunctivitis and other ocular allergic diseases, can appear red eyes, foreign body sensation and other discomforts. 5. Others: In addition, dry eye patients may also experience redness of the eyes, foreign body sensation and other discomforts, and may also be accompanied by dry eyes and other discomforts. It is recommended that patients with obvious redness and foreign body sensation should consult a doctor in time to evaluate their condition and follow the doctor’s instructions for treatment.