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.

Stress is the body’s natural defense against predators and danger. It causes the body to flood with hormones that prepare its systems to evade or confront danger. People commonly refer to this ...

Somatic symptom disorder (SSD) is a mental disorder in which a person has excessive thoughts and behaviors about physical symptoms—such as pain or fatigue—which may or may not have a medical cause.

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 ...

Diarrhea can range from a mild, temporary condition to a potentially life threatening one. Common causes include viruses, bacteria, and parasites. Diarrhea is characterized by loose or watery stools.

Do certain foods prompt an emergency dash to the loo? Gut symptoms blight millions of Brits every year. But the cause may not be actually be irritable bowel syndrome or increasingly common lactose ...

Regular lie-ins could be an early symptom of a number of life-threatening diseases including Alzheimer’s, according to a new study. Researchers have concluded that those who sleep roughly seven ...

What causes mental illness? It's complicated. Although the exact cause of most mental illnesses isn't known, research shows they often come from a complex mix of biological, genetic, psychological ...

Symptoms include fever, internal bleeding, and persistent crying in children. Despite extensive testing, the exact cause remains unknown, with Ebola and Marburg ruled out. After last year's ...