ScienceInsights

Tea tree oil and snakeroot extract have real evidence behind them for toenail fungus. Here's what works, what doesn't, and when to see a doctor.

Learn how doctors diagnose temporal arteritis, from early warning signs and blood tests to biopsy and imaging techniques.

Fish is healthy, but mercury and other contaminants raise fair questions. Here's how to enjoy seafood safely based on your age and health.

Curious about plasma donation? Here's what actually happens to your body during and after the process, from separation to recovery.

Learn why womb-like sensations calm newborns, how the 5 S's work, and when crying may signal something more serious.

Follow fetal growth from a tiny cluster of cells to a full-term baby, with week-by-week sizes and the factors that influence development.

A fast heart rate can come from stress, caffeine, or an underlying condition. Learn what's driving yours and how to bring it back down safely.

OxyContin is more potent than many realize. Learn how it compares to other opioids, what doses exist, and where the danger zone begins.

Itchy eyes can stem from allergies, dry eye, blepharitis, or screen time. Learn what's likely causing yours and how to tell the difference.

Premature ejaculation has real biological and psychological causes, from serotonin levels to anxiety. Here's what's behind it and what can help.