It's also possible they might have all these behaviors or a mix of these. ADHD symptoms usually show up when children are young — around school age. But you might notice them much earlier.

Narcissism is extreme self-involvement to the point where a person ignores the needs of those around them. While anyone may have narcissistic behavior once in a while, true narcissists often ...

Adolescents may be less likely to show hyperactivity, although symptoms of inattentiveness and impulsivity often continue. Attention deficit hyperactivity disorder (ADHD) is a neurodevelopmental ...

If you already have a liver condition such as cirrhosis, tell your doctor if you have any new or worsening symptoms. Symptoms of liver cancer are often quite vague and vary depending on where the ...

What Causes Pneumonia and Who Is at Risk? Pneumonia symptoms can vary widely from a mild flu to a life-threatening emergency. Cough, fever, and fatigue are common, but you should seek help for more ...

The symptoms of obesity go beyond excess body fat. People with obesity may experience skin problems, shortness of breath, trouble sleeping, and more. Some symptoms may increase the risk of developing ...

Acute myeloid leukemia (AML) can cause many different signs and symptoms. Some are more common with certain subtypes of AML. More often these symptoms are caused by something other than leukemia. But ...