I think you should first of all find out the factor which leads to the stinging in your eyes. When the eyes are lack of enough moisture and lubrication, the eyes can become dry and you will feel stinging in your eyes. Of course, if you overuse your eyes and feel fatigue, your eyes will be stinging, too. Besides, stinging in the eyes can be triggered due to smoke, cold, flu, pollen, eye infection, etc. If it is caused by such foreign particles as smoke, dust and irritants, thus as soon as you get rid of the particles, you will feel less stinging in your eyes. If you strain your eyes, thus what you need to do is to have a good rest. If your eyes are dry, you can drip some eye drops to keep them moist. Also you need to blink your eyes as much as possible. In addition, you can use a humidifier in your working place to keep your eyes moist.