Nonmotor symptoms, especially gastrointestinal issues, often appear first. The disease affects the autonomic nervous system, including the enteric nervous system that regulates bowel motility.

Discover 5 hidden COVID symptoms often overlooked. Learn to recognize subtle infection signs before obvious symptoms develop and protect your health.

FDA warns of severe itching risk when stopping long-term use of allergy medications cetirizine and levocetirizine, affecting quality of life for some users.

Billy Joel was diagnosed with normal pressure hydrocephalous. But what is NPH, and what are the symptoms?

Managing symptoms If you’re finding allergy pills alone just aren’t cutting it this year, the best thing you can do to reduce symptoms is cut your pollen exposure wherever possible.

A new study published in Lancet Regional Health-Americas finds that Alzheimer's symptoms can present much earlier than thought, as early as the mid-20s.

Learn about eye changes that could indicate serious health conditions, from blurry vision to persistent floaters and flashes that require prompt attention.

A new study on the genetic causes of the PTEN Hamartoma Tumour Syndrome (PHTS) has found that inhibitors of the PI3ka pathway, commonly used as anticancer drugs, are also effective against this ...

Experts share the typical measles symptoms in adults, plus why this disease is on the rise and what diagnosis, management, and prevention look like.

We asked experts what to do if your doctor dismisses your symptoms—or merely chalks them up to anxiety.