Autism spectrum disorder (ASD) is a developmental disability caused by differences in the brain. Scientists do not yet know exactly what causes these differences for most people with ASD. However, some people with ASD have a known difference, such as a genetic condition. There are multiple causes of ASD, although most are not yet known. More...

Stress isn’t always bad. In small doses, it can help you perform under pressure and motivate you to do your best. But when you’re constantly running in emergency mode, your mind and body pay the price. If you frequently find yourself feeling frazzled and overwhelmed, it’s time to take action to bring your nervous system back into balance. You can protect yourself – and improve how you think and feel – by learning how to recognize the signs and symptoms of chronic stress and taking steps to reduce its harmful effects. More...

Alcohol use disorder (which includes a level that’s sometimes called alcoholism) is a pattern of alcohol use that involves problems controlling your drinking, being preoccupied with alcohol, continuing to use alcohol even when it causes problems, having to drink more to get the same effect, or having withdrawal symptoms when you rapidly decrease or stop drinking. More...

Multiple sclerosis (MS) is a potentially disabling disease of the brain and spinal cord (central nervous system). In MS, the immune system attacks the protective sheath (myelin) that covers nerve fibers and causes communication problems between your brain and the rest of your body. Eventually, the disease can cause the nerves themselves to deteriorate or become permanently damaged. More...