A white dot on the eye is considered to be related to fat grain, granuloma, conjunctivitis and so on. 1. Fat grain: due to the sebaceous glands of the skin around the eyes, secrete too much oil or be blocked for a long time can not be discharged normally, and then it will be further formed into milky white pinhead to rice-like size of the pimples. 2. Granuloma: It is caused by purulent bacterial infection, clinically divided into external and internal granuloma. External wheals are mainly found at the eyelid margins at the base of the eyelashes, while internal wheals are found inside the eyes, such as in the glands of the eyelids. The main symptoms are redness, swelling and local hardness of the eyelid. 2-3 days after the occurrence of blepharitis, a yellowish-white pus spot will form in the center of the inflammation, and the pus spot of external wheal occurs on the surface of the skin of the eyelid margin. 3. Conjunctivitis: it may be caused by chronic conjunctivitis, when the lymphatic vessels are blocked it is easy to lead to a scar infiltrated by lymphatic fluid accumulation. Manifested as a white dot on the eye, in addition to eye foreign body sensation, eye itching, photophobia and other uncomfortable symptoms. A small white dot on the eye is recommended to go to the hospital in time to determine the condition and then symptomatic treatment.