Redness and swelling in the lower eyelid area of the patient’s left eye is usually due to granuloma, allergic blepharitis, and ocular trauma. Eyelid granuloma is a purulent inflammation of the eyelid glands. Under the stimulation of inflammation, the patient may have redness and swelling of the eyelid, accompanied by localized pain, and may even have abscess formation. Allergic blepharitis is caused by an allergic reaction to the skin of the eye after contact with allergens, such as smoke, dust, cosmetics, skin care products, etc. In addition to localized redness and swelling of the eyelids, the patient will also be accompanied by itching in the affected area. Ocular trauma patients because of local impact or sharp objects, patients may appear eyelid redness, swelling, pain and other symptoms, may also be accompanied by subcutaneous bruising, bleeding and other symptoms of discomfort. It is recommended that patients with significant redness and swelling of the eyelids go to the hospital in time to have their condition evaluated and treated according to the doctor’s instructions.