ScienceInsights

Burning when you pee could be a UTI, but not always. Learn how to tell UTIs apart from other infections and when to see a doctor.

Find out how many calories a 4-mile walk burns based on your weight, pace, and terrain, plus a quick personal estimate.

Low and high blood sugar episodes feel very different. Learn what each one actually feels like from the inside, and when to seek emergency care.

SLES is gentler than SLS, but it can still irritate sensitive skin. Here's what the science says about its safety and how to choose wisely.

Dry eyes can cause more than just dryness. Learn the common symptoms, why they vary, and when to see a doctor about your eye comfort.

From breath tests to genetic screening, here's a clear look at how lactose intolerance is diagnosed and which test might be right for you.

From staying hydrated to choosing the right foods, here's how to manage diarrhea at home and when to see a doctor.

Pimples are just one type of blemish that acne can cause. Learn how the two terms differ and what that means for treatment.

Losing weight can leave skin loose, but the right pace, strength training, and nutrition can help your skin keep up with your progress.

How to treat a sprained foot at home, when to see a doctor, and what actually helps you heal faster—including the latest thinking on ice and rest.