ScienceInsights

Upper back pain is often caused by muscle strain or poor posture, but it can sometimes point to something more serious. Here's how to tell the difference.

Cooling your skin fast and moisturizing early are your best bets for reducing sunburn peeling, but sometimes it can't be avoided entirely.

Chlamydia often causes no symptoms in men, but when it does, here's what to look for, when to get tested, and how it's treated.

Maintaining 160 pounds depends on more than weight alone. Learn how activity, height, age, and body composition shape your daily calorie needs.

From genetics and stress to diet and scalp conditions, here are the most common reasons young men lose hair and how to tell them apart.

Vegan butter has less saturated fat, but the full picture is more nuanced. Here's how it compares to dairy butter on calories, sodium, and ingredients.

Sildenafil citrate and Viagra share the same active ingredient. Learn what sets them apart and what to consider when choosing between them.

A realistic look at knee replacement recovery, from the first days home to returning to sports, so you know what's normal and what to expect.

Your toilet posture affects how easily you can poop. Learn the simple position adjustments that work with your body's anatomy for more comfortable bowel movements.

Warm compresses are your best bet for a stye, but there's more you can do at home to heal faster and avoid future ones.