If a child has mild mental retardation, he or she will grow up with the following symptoms: 1. Poor attention span, children tend to be distracted and hyperactive in class, resulting in a significant drop in academic performance. 2. Poor language development, children tend to be less fluent in language expression, even at the age of five weeks, they are still unable to speak a sentence fluently. 3. Children often have great difficulty accepting new things, resulting in reduced social adaptation. For children with mild mental retardation, they can be rehabilitated in a timely manner and improved by applying drugs that nourish the brain nerves, for example, they can be given the brain tonic solution.