The patient’s eyes are a little swollen and painful may be caused by blepharitis, eye trauma, conjunctivitis and other diseases. 1. Blepharitis: Blepharitis refers to purulent inflammation of the eyelid glands, and patients may experience discomfort such as redness, swelling and pain of the eyelids under the stimulation of inflammation. 2. Eye trauma: If the patient’s eyes are injured, such as foreign object insertion, boxing, etc., the external force will make the patient’s eyes swollen, painful and other uncomfortable symptoms, and may also appear eyelid subcutaneous bruising. 3. Conjunctivitis: If the patient has conjunctivitis and other ocular inflammation, due to inflammation stimulation, the patient’s conjunctival vasodilatation, exudate may enter the relaxed conjunctiva, resulting in conjunctival edema, may also be accompanied by eye pain and other discomforts. It is recommended that patients with significant eye swelling and pain should seek prompt medical attention to evaluate their condition and follow the doctor’s instructions for treatment.