ScienceInsights

Morning sickness is driven by pregnancy hormones, slower digestion, and possibly evolution. Here's what's actually happening in your body.

Cold sores are caused by HSV-1, a virus most people catch in childhood. Learn how it spreads, what triggers outbreaks, and why it's so widespread.

Most abortions are labeled elective, but the reasons behind them—cost, timing, health—are rarely simple. Here's what the data actually shows.

Erectile dysfunction has many causes, from blood vessel damage and diabetes to stress and medications. Here's what's actually behind it.

Hard stools are usually caused by low fiber intake, certain medications, or a sedentary lifestyle — and most cases improve quickly with simple changes.

Learn how to treat a sprained foot at home, what support to use, and when your injury might need a doctor's attention.

Panic attacks happen when your brain's alarm system misfires. Learn what causes them, what triggers them, and why they tend to come back.

Tongue bleeding is usually harmless, but sometimes it can signal cancer. Learn what warning signs to watch for and when to see a doctor.

DayQuil contains three active ingredients worth knowing, especially if you take other medications or have high blood pressure.

Medicare has four parts, each covering different costs. Here's what Parts A, B, C, and D actually cover and how they fit together.