The redness and swelling of the lower eyelid of the patient’s right eye may be related to trauma to the lower eyelid of the right eye, or it may be caused by blepharitis or acute dacryocystitis. 1. Trauma to the lower eyelid of the right eye: If the lower eyelid of the right eye is accidentally traumatized by an external force during the patient’s work or life, it may cause redness and swelling of the lower eyelid of the right eye, which may be accompanied by obvious discomfort such as bruising and pain, and other symptoms. 2. Blepharitis: Blepharitis is a purulent inflammatory disease of the glands of the eyelids, which can cause redness, swelling and pain in the eyelids. If the patient’s right eye has blepharitis, it may cause redness and swelling of the lower eyelid of the right eye, accompanied by obvious pain, itching and other uncomfortable symptoms. 3. Acute dacryocystitis: Patients with acute dacryocystitis may also experience redness and swelling of the lower eyelid of the right eye under the stimulation of inflammation, which may also be accompanied by tearing and difficulty in opening the eyes. It is recommended that patients with obvious redness and swelling of the lower eyelid of the right eye should consult a doctor promptly to assess their condition and follow the doctor’s instructions for treatment.