ScienceInsights

Bumps under your eyes could be milia, syringomas, or xanthelasma. Learn how to identify each type and find the right treatment for your skin.

High cholesterol rarely has a single answer for life expectancy. Your risk depends on levels, age, and other health factors—here's what the evidence shows.

Men typically experience a midlife crisis between 40 and 60, though hormones, life events, and personality all shape when and whether it happens.

Learn the 9 official symptoms of inattentive ADHD, why they're often missed in girls and adults, and what's needed for a proper diagnosis.

Unexplained weight gain often has a real cause—from thyroid issues and medications to sleep and hormones. Here's how to figure out what's going on.

Yellowing on the back of your teeth often comes down to tartar, thinner enamel, or acid erosion. Here's what causes it and how to address it.

Learn the safe ibuprofen dose for adults and children, how often you can take it, and who should use less or avoid it altogether.

Learn how to recognize a stye, tell it apart from a chalazion, and know when your eye symptoms might need a doctor's attention.

Learn the key symptoms of type 1 diabetes, how doctors confirm a diagnosis, and when to seek emergency care.

Your daily calorie needs shift with age, sex, and activity level. Here's how to find the number that actually works for your body.