The feeling of burning, or sore eyes may be caused by a blocked or infected tear duct. As we all know, we have a bit of natural mucus discharge building up in the corners of our eyes every morning. They can be make up of skin cells from our upper eyelids, dust, tears and mucus. There are plenty of bacteria, viruses or fungi in them. We will sweep them out well by our tears. Once the allergens increase or a blocked tear duct occurs, we fail to clean up the eye boogers completely. As a result, we will suffer some eye infections, especially in spring with a unpredictable weather, not always. Never forget our powerful immune system. Well, it is time to clean up your room and keep a good personal hygiene.