A raised white bump on the eyeball may be due to blepharospasm, pterygium, conjunctival cyst and so on. 1. Blepharospasm: there may be white raised plaques in the conjunctiva of the eyelid near the cornea, mostly related to the external environmental stimuli, usually no special treatment is needed when there is no obvious discomfort. 2. Pterygium: when the volume of pterygium is small, when looking in the mirror, you can find wing-like newborn abnormal growths on the surface of the eyeball, the main body appears white, accompanied by a slight sense of foreign body in the eyeball, redness in the eye, etc., and some of them will invade the cornea when the disease progresses. 3. Conjunctival cysts: can be caused by trauma, foreign body implantation, etc., generally does not affect vision, there may be a foreign body sensation, there is a need for removal can be removed by medical surgery. It is recommended that patients with raised white bumps on the eyeball, accompanied by discomfort, should go to a regular hospital in time to clarify the cause of the disease, under the guidance of the doctor, so as to avoid delays in the condition of the body to bring adverse effects.