Only one bacterial species has been credited for causing Lyme disease in humans — until now.

When seizures go on for too long, they can put patients' lives at risk. And doctors now have some new guidance on how to treat patients with prolonged seizures.

Looking to lose weight? You may want to try going a little nuts.

Scientists don't know exactly what causes nasal polyps to grow. But they may have developed an effective treatment for these bothersome growths.

With smartphones, smart TVs and rumors of self-driving smart cars, it’s no surprise that smart contact lenses exist. But it may surprise you to learn just what makes these lenses so "smart."

Valentine’s Day can be a time for celebrating love or for nursing a broken heart. But it's also a time to recognize those born with a physically broken heart.

What can cause a runny nose, red and itchy eyes, sneezing, fatigue and cough — all without a fever? If you guessed hay fever, you probably know the frustration of seasonal allergies. But there may be some relief where that is concerned.

As people age, cognitive functions like memory and judgment can change. And viral infections might have something to do with that.

Patients with major depressive disorder (MDD) are often prescribed one of two treatments: antidepressants or therapy. But which one works best?