Eyelid pain and swelling in patients may be related to blepharitis, eye trauma, contact dermatitis and other causes. 1. Blepharitis: Blepharitis refers to suppurative inflammation of the eyelid glands. Under the stimulation of inflammation, patients can suffer from eyelid congestion, swelling, pain and other uncomfortable symptoms, and the pain can be aggravated when the patient blinks. 2. Ocular trauma: patients with ocular trauma may experience redness, swelling, pain and tearing of the eyelids due to impact or knocking. 3. Contact dermatitis: If allergic patients come into contact with allergenic substances such as eye shadow, it can cause the body to develop abnormal immunity, resulting in contact dermatitis, which can cause redness, swelling, pain and other symptoms. It is recommended that patients with obvious eyelid pain and swelling should consult a hospital in time to assess their condition and standardize their treatment under the guidance of a doctor.