Sudden swelling and pain in the eyes may be caused by diseases such as glaucoma and orbital cellulitis. Patients with glaucoma will have elevated intraocular pressure, which will cause the eyeball to swell, and the pain nerve fibers in the eyeball wall will be stimulated, resulting in eye swelling, pain, and congestion. Orbital cellulitis patients due to the presence of infection in the orbit, resulting in orbital soft tissue congestion and edema, which can cause the patient’s eyes to swell, and inflammation stimulation will also cause the patient to experience severe pain in the eyes. It is recommended that patients with significant eye swelling and pain should seek medical attention to evaluate their condition and follow the doctor’s instructions for treatment.