Swelling and bulging of the white of the eye may be caused by blepharospasm, conjunctivitis, pterygium and so on. 1. Blepharospasm: due to ultraviolet rays, wind and sand stimulation, it can cause conjunctival hyperplasia and degeneration, resulting in blepharospasm, and thus the patient will have swollen and convex whites of the eyes. 2. Conjunctivitis: due to allergy, chemical and physical stimulation, infection, etc., the conjunctival blood vessels should be dilated, which leads to conjunctival congestion and edema, and the patient may have symptoms of redness and swelling of the eyes, tearing, photophobia and other discomforts. 3. Pterygium: Pterygium can be caused by environmental pollution, ultraviolet stimulation, heredity, viral infection, etc., resulting in redness and swelling of the patient’s eyes, and the patient’s white of the eye may appear elevated lesions. It is recommended that patients with elevated swellings on the white of the eye consult a hospital in time to assess their condition and follow the doctor’s instructions for treatment.