Are you a regular computer user if so it might be computer vision syndrome
Put eyemist eye drops 3to 4times daily and ocupol.dx eye oint to be rubbed twice daily on lids
Next Steps
Follow 20.20.formula ie close your eyes for 20.seconds after every 20.minutes. keep proper distance between eyes and screen ie approx 20.inches.wash your eyes frequently with fresh water and don't sit facing the ac or blowers and consume lot of fresh fruits and vegetables.