Biology Insights

Learn what causes heart attacks, from blocked arteries and plaque rupture to coronary spasms and lifestyle risk factors.

Arthritis affects millions of Americans across all ages. See who's most at risk, which types are most common, and how the condition affects daily life.

Neck stiffness is usually harmless, but some symptoms need prompt care. Learn what's causing yours and how to find relief at home.

Vaginal probiotics aim to support a healthy microbiome, but the evidence is mixed. Here's what research actually says about how they work.

Simple daily habits that reduce your risk of sciatica, from core strengthening and proper lifting to desk setup and sleep position.

Vertigo is more than just dizziness. Learn what causes that spinning sensation, how doctors diagnose it, and what treatments can help you feel steady again.

Narcolepsy often begins with the immune system attacking brain cells that regulate sleep. Learn what triggers it and the early signs to watch for.

Cradle cap is common and usually harmless. Learn what causes it, how to treat it at home, and when it's time to call your doctor.

Learn how an underactive thyroid affects your energy, mood, skin, and more — and what to expect from diagnosis and treatment.

Strep throat is contagious for weeks without treatment, but antibiotics can shorten that window to 24 hours. Here's what to know before returning to work or school.

Encephalopathy refers to brain dysfunction with many possible causes. Learn about the common types, how they're diagnosed, and which ones can be reversed.

Ovulation itself lasts just 12–24 hours, but your fertile window spans six days. Here's what's actually happening in your body and when.

MDMA, known as a "ping" or "pinger," floods the brain with serotonin. Here's what it actually does to your body and why it carries real risks.

From sitz baths and diet tweaks to office procedures and surgery, here's what actually helps hemorrhoids heal and stay away.

Tantra is more than its reputation suggests. Learn what it actually involves, what science says, and how to begin a safe practice.

Meat contains some creatine, but cooking losses and serving sizes mean you're getting far less than you might think compared to a supplement.

Sharp pain works differently than dull aches. Learn what causes it, how doctors assess it, and which symptoms mean you should seek care right away.

Compulsive lying isn't a diagnosis, but brain differences, trauma, and mental health conditions can all play a role. Here's what the science says.