I am sorry for that. As we know, the cornea is a layer of transparent thin in front of the eye which is often exposed to the air. The damage on the transparent thin layer, sand hole, the stabbed corneal, bacteria, viruses can all give rise to infection and produce corneal ulcer. In addition, the allergy may also cause corneal ulcer. It is bad for people with corneal ulcer. A corneal ulcer can cause redness, pain and foreign feelings, or even lead to blindness. Thus it's better for you to treat it as soon as possible for the sake of your eyes. If your corneal ulcer is not very serious, there are some suggestions for you to take good care of your eyes at home, such as do not wear contact lenses, touch or rub your eyes with your fingers. Besides, using cool compresses or tea bags to relieve the symptom, washing your hands often to avoid worse infection. However, if those tips above do not work, you'd better go to see an ophthalmologist, and take a professional treatment.