Biology Insights

Queasiness has many causes, from skipping meals to stress. Learn what's behind that unsettled feeling and simple ways to find relief.

Hives are itchy, raised welts that can appear anywhere on the skin. Learn what causes them, how they're treated, and when to seek medical care.

Flu season varies by region and climate. Learn when it peaks, why cold weather plays a role, and the best time to get vaccinated.

IRMAA is recalculated each year using income from two years prior. Learn how brackets work, when you're notified, and how to appeal after a life change.

Snorting oxycodone speeds up the high but raises overdose risk and damages the nose and lungs. Here's what happens in the body and why it fuels addiction.

Allergy cough responds better to antihistamines than cough syrup. Learn which medications, home remedies, and environmental changes actually help.

Strep throat is usually mild, but untreated cases can lead to heart damage, kidney issues, and more. Here's what the real risks look like.

A clear look at the main types of performance-enhancing drugs, how they work in the body, and the health risks they carry.

Learn what happens during each phase of your menstrual cycle, from menstruation to ovulation, and what a normal cycle actually looks like.

If your antihistamine seems less effective over time, tolerance may not be the real issue. Here's what's actually happening and what to do about it.

Grandiose narcissists display bold confidence and a need for admiration, but there's more beneath the surface. Learn the key traits, causes, and what treatment looks like.

Vyvanse costs can add up fast. Here are practical ways to pay less, from generics and manufacturer programs to insurance tier exceptions.

Serotonin syndrome can develop when medications stack up in unexpected ways. Learn what causes it, how it feels, and how to stay safe.

Cluster headaches stem from the hypothalamus, genetics, and circadian disruption. Learn what drives these attacks and who is most at risk.

Yellow discharge can be a sign of chlamydia, gonorrhea, or trichomoniasis. Learn how to tell them apart and why getting tested sooner helps.

Learn when ovulation happens in your cycle, the hormones involved, how to recognize it, and what it means for fertility.

Learn what causes small bowel obstruction, from post-surgical adhesions and hernias to Crohn's disease, tumors, and how doctors identify the underlying cause.

Plant-based eating may lower heart disease and diabetes risk, reduce your environmental footprint, and raise some worthwhile ethical questions.

Most toddler tantrums last 2–15 minutes, but duration varies by age and triggers. Learn what's normal and when to talk to a pediatrician.