ScienceInsights

Nerves do far more than carry pain signals. Learn how the three nerve types work together, and what happens when they're damaged or start to heal.

Pregnancy weeks, months, and trimesters don't always add up neatly. Here's how they actually work and how to track where you are.

Sodium is the biggest culprit, but processed meats, added sugar, alcohol, and even black licorice can raise your blood pressure too.

A membrane sweep may help start labor naturally, but it's not for everyone. Here's what the evidence says and how to weigh your options.

Sinus pressure relief is often possible at home using saline rinses, steam, and smart sleep positions. Here's what actually works and when to see a doctor.

Back neck pain can stem from muscle strain, disc issues, posture habits, or even autoimmune conditions. Here's what might be behind yours.

Different acne scars respond to different treatments. Here's what the evidence says about lasers, microneedling, subcision, and more.

A clear guide to healthy blood sugar ranges for fasting, after meals, pregnancy, and more — including what A1C numbers actually mean.

Untreated cavities can progress from minor decay to life-threatening infections. Here's what actually happens inside your tooth over time.

Learn how allergies work, what triggers them, and how doctors diagnose food, seasonal, drug, and skin allergies.