Heart Disease
The leading cause of death worldwide. Understand coronary artery disease, heart failure, arrhythmias, and how to protect your cardiovascular health.
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Diabetes
Type 1, Type 2, and gestational diabetes — learn about blood sugar management, insulin therapy, diet, and preventing life-threatening complications.
Read guideHypertension
High blood pressure is the "silent killer" — present in 1.28 billion adults. Discover how to diagnose, manage, and control it before serious damage occurs.
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262 million people live with asthma. Explore triggers, attack prevention, inhaler techniques, biologics, and achieving the "well-controlled" goal.
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The world's leading cause of disability. Understand different types, recognize the signs in yourself and others, and learn about effective treatments including new medications.
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More than 100 types affecting 58.5 million Americans. From osteoarthritis to rheumatoid arthritis — understand your type and the treatments that work.
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Featured article
Heart Disease: The Complete Guide to Causes, Symptoms, and Modern Treatment
Cardiovascular disease kills one person every 34 seconds in the United States. But up to 80% of heart disease is preventable. This comprehensive guide — reviewed by Dr. James Thornton, MD, FACC — covers everything from understanding your risk factors to the latest interventional cardiology techniques.
Read full guide →Symptom Guides
What does this symptom mean?
Don't ignore what your body is telling you. Our symptom guides explain possible causes, urgency levels, and when to see a doctor.
Chest Pain
Could be cardiac, musculoskeletal, or digestive. Learn to recognize the warning signs that demand immediate emergency care.
Potentially urgent — may require 911
Chronic Fatigue
Persistent tiredness affecting daily life can have dozens of causes — from anemia to thyroid disease to sleep disorders.
See your doctor if lasting >2 weeks
Headache
Tension, migraine, cluster, or something more serious? Identify your headache type and find the right treatment approach.
"Thunderclap" headache: call 911
Fever
A fever is your immune system fighting back. Know which temperatures need medical attention and how to care for yourself at home.
Above 103°F (39.4°C): seek care
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Our Medical Experts
Reviewed by real physicians
Every article is reviewed and signed off by a physician with active clinical practice in that specialty. No anonymous reviewing.
Dr. James Thornton
MD, FACC
Cardiology · Johns Hopkins
Dr. Sarah Chen
MD, PhD, CDE
Endocrinology · UCSF
Dr. Aisha Patel
MD, FCCP
Pulmonology · Mayo Clinic
Dr. Eleanor Kim
MD, PhD
Psychiatry · Stanford Medicine
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