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.
Knowing the exact cause of autism is hard because the human brain is very complicated. The brain has more than 100 billion nerve cells called neurons (say: NUR-ahns). Each neuron may have hundreds or thousands of connections that carry messages to other nerve cells in the brain and body.