ScienceInsights

Styes usually clear up with warm compresses at home, but some need medical care. Here's what actually helps and when to see a doctor.

At 5 weeks pregnant, normal hCG levels vary widely. Learn what ranges are typical, how quickly they should rise, and when to talk to your doctor.

Most diarrhea clears up in a few days, but the timeline depends on the cause. Here's what to expect and when to see a doctor.

Low and high blood sugar feel different, carry different risks, and need different responses. Here's what to know about both.

Learn how to spot hives on your toddler's skin, what causes them, and which symptoms mean it's time to call a doctor.

Chest colds are usually viral, so antibiotics won't help. Here's what the evidence actually supports, from zinc timing to sleep setup.

Some supplements genuinely support hormone balance, but the right ones depend on your specific imbalance. Here's what the evidence says.

Learn how many calories you actually need to build muscle, including how to set your surplus and balance protein, carbs, and fat for real results.

At 9 months, babies typically need 24–32 oz of breast milk or formula daily, balanced with growing solid food meals.

From acting fast at the first tingle to OTC creams and prescription antivirals, here's what actually helps cold sores heal more quickly.