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.
The exact causes of autism spectrum disorder (ASD) are unknown, although it is thought that several complex genetic and environmental factors are involved.The causes of ASD can be described in two ways:1  Primary ASD (also known as idiopathic ASD) â where no underlying factors can be identified to explain why ASD has developed. 2  Secondary ASD â where an underlying medical condition or environmental factor thought to increase the risk of ASD is identified.he causes of ASD can be described in two ways: 1  Primary ASD (also known as idiopathic ASD) â where no underlying factors can be identified to explain why ASD has developed. 2  Secondary ASD â where an underlying medical condition or environmental factor thought to increase the risk of ASD is identified.