Wellbutrin side effects. SKIN AND APPENDAGES (SKIN, LEGS AND ARMS). Acne-Eruptions of the oil glands of the skin, especially on the face, marked by pimples, blackheads, whiteheads, bumps, and more severely, by cysts and scarring.
Causes. There is no known single cause for autism spectrum disorder, but it is generally accepted that it is caused by abnormalities in brain structure or function. Brain scans show differences in the shape and structure of the brain in children with autism compared to in neurotypical children.
Causes. Autism spectrum disorder has no single known cause. Given the complexity of the disorder, and the fact that symptoms and severity vary, there are probably many causes. Both genetics and environment may play a role. 1  Genetic problems. 2  Several different genes appear to be involved in autism spectrum disorder.