The eyes burn because nerves on the surface of the eye are irritated. The nerves are irritated because something is wrong with the moist surface of the eyes. Tears furnish moisture to the ocular surface.
Now, about your problem. The most likely cause for your burning is a defective tear film: inadequate tear production, abnormal chemistry, wrong, pH, etc.
It would be wise to have Dr.Koganovsky evaluate you. It is most likely a simple case of dry eyes, but there are other major medical problems that include tear film deficiencies. Your physician knows what questions to ask and what diagnostic tests to perform. In the meantime, she can recommend the best
treatment plan to relieve your discomfort.