Imagine waking up already feeling drained, as if you never slept at all. Or noticing that your hands feel inexplicably stiff and swollen, making simple tasks like opening a jar or even typing feel unusually difficult. It’s easy to chalk such symptoms up ...

Our immune system has a dark side: It’s supposed to fight off invaders to keep us healthy. But sometimes it turns traitor and attacks our own cells and tissues. What are called autoimmune diseases can affect just about every part of the body — and tens ...

City health officials are sounding the alarm as a Legionnaires’ disease outbreak spreads through Harlem, killing two and sickening at least 58 others. The pneumonia-like illness, first detected July 25, has been reported in zip codes 10027, 10030, 10035 ...

An estimated 476,000 people are diagnosed with Lyme disease annually, according to the CDC. Tick bites can infect humans with Lyme disease. Lyme disease symptoms happen in stages and may vary from person to person. When it's summer in the South, spending ...

As in symptomatic Crohn’s disease, inflammation is occurring in the digestive tract, but symptoms may be subtle or even absent, leaving people with the condition unaware that anything is wrong. It can come to light incidentally, when evidence of ...

They are known as "kissing bugs," but instead of spreading love, they transmit a parasitic disease that can be deadly. Chagas disease is considered endemic; it's present in 21 countries in the Americas, excluding the United States. However, a report from ...