Dyslexia is a specific learning difficulty that primarily affects reading and writing skills. It is a condition that a person is born with, and it often runs in families. Dyslexia is not due to problems with intelligence, hearing, or vision. People with dyslexia are not stupid or lazy, and most have average or above-average intelligence. Dyslexic people may have difficulty processing and remembering information they see and hear, which can affect learning and the acquisition of literacy skills. Some common dyslexia symptoms in teens and adults include difficulty reading, trouble with spelling, and difficulty with phonological processing (the manipulation of sounds). Dyslexia can lead to several problems, including trouble learning, social problems, and problems as adults. However, with early assessment and intervention, the prognosis is generally good for individuals with dyslexia. Treatment for dyslexia should focus on the specific learning problems of affected individuals, and generally includes modifying teaching methods and the educational environment to meet the specific needs of the individual with dyslexia.