The phenomenon of blackness in front of the child’s eyes is considered to be a lack of energy or insufficient blood supply to the brain, resulting in blurred and blackened vision. It is important to pay attention to the following aspects: First, pay attention to whether the child has not eaten in time resulting in insufficient energy and causing hypoglycemia. The second aspect is to pay attention to the child’s blood pressure, whether he or she usually has low or high blood pressure, which leads to insufficient blood supply to the brain. The third aspect is to pay attention to whether the child has congenital heart disease or cardiac arrhythmia and other underlying diseases, because heart problems and insufficient blood supply can also cause ischemia and lack of oxygen to the brain. The fourth aspect is to pay attention to whether the child has middle ear or other infectious factors, especially intracranial infections. Of course, there are other clinical symptoms associated with diseases such as intracranial infections.