Are you exposed to lot of pollution  if so it might be allergy  and /or infection. In that case you must use antiallergic e.g. olopatadine. or are a regular computer user if so it might be computer vision syndrome please use lubricant eye drops e.g. teardrop 2to3 times daily e.g. teardrop in both conditions  rub ocupol d's eye oint twice daily on lids.

Hello Your symptoms are suggestive of allergy Try A cold compresses B use antiallergic eyedrop like epinastine eyedrop along with lubricating eyedrop frequently C. Soft steroid like fluorometholone can be used in pulse dose in severe cases Having said that it is provisional diagnosis Kindly share photos of your eye so that I may guide you better Regards