Medicine, explained
What doctors do, which doctor to see, what your numbers mean, how cuts get stitched, and how to get the most out of the care you get. Start with where to go, then pick a section.
Watch: the narrated video (4 minutes)
Where to go for care
The right place saves time and money, and in an emergency it saves lives. Match the problem to the place:
| Place | Best for | Typical wait and cost |
|---|---|---|
| Call 911 | Anything that could kill or disable: chest pain, stroke signs, severe bleeding, can't breathe, unresponsive | Ambulance crews start treatment on the way |
| Emergency room (ER) | Serious injuries and illness, day or night; has CT scans, surgeons and specialists on call | Sickest patients first; often the most expensive visit |
| Urgent care | Stitches, sprains, simple fractures, flu, strep, ear and urinary infections | Walk in, usually under an hour; far cheaper than the ER |
| Telehealth (video visit) | Colds, pink eye, rashes, refills, follow-ups, counseling | Minutes from home; many plans cover it |
| Your primary care doctor | Checkups, screenings, long-term conditions, new symptoms that aren't urgent, referrals | Book ahead; many offer same-day sick visits |
Pick a section
Your doctor (primary care)
Family medicine, internal medicine, pediatrics and OB/GYN. What happens at a checkup and which screenings you need at your age.
Specialists
Two dozen specialties, from cardiology to urology: what each treats, when you'd see one, and how long they train.
Sutures and wound care
When a cut needs stitches, the four ways to close a wound, how doctors suture, removal times and signs of infection.
Vital signs and numbers
Blood pressure, heart rate, oxygen, temperature, blood sugar and cholesterol: what is normal and what to do about it.
First aid and emergencies
Free for everyone: CPR, choking, bleeding, stroke, heart attack, allergic reactions, burns, heat, snakebite.
Becoming a doctor
MD vs DO, the path from college to residency, what it costs, and other careers in medicine.
Free health basics test
10 questions with explained answers and a printable certificate.
Members guides
Common conditions 🔒
High blood pressure, diabetes, asthma, arthritis and more.
Lab tests explained 🔒
Your blood work, line by line.
Medications 101 🔒
Generics, pain relievers, labels, saving money.
Preparing for surgery 🔒
Before, the day of, and recovery.
Inside an operation 🔒
The procedure, step by step, and who is in the room.
What an appendectomy looks like 🔒
Appendicitis and the surgery, step by step.
Using an AED 🔒
Four steps, pad placement, special cases.
Monthly newsletter
Health news, a condition of the month, a first aid skill and more.
Home and ranch medical kit 🔒
What to keep and why.
Insurance and Medicare 🔒
The words, the plans and the 2026 numbers.
Getting the most from a visit 🔒
What to bring, what to ask.
See all guides · Glossary · FAQ
What a medical doctor does
Every doctor, from a family physician to a brain surgeon, works through the same basic steps. Knowing them helps you be a better patient.
| Step | What the doctor does | How you can help |
|---|---|---|
| 1. History | Asks what is wrong, when it started, what makes it better or worse, your past illnesses, medicines and family history | Bring a list of your medicines and write your symptoms down before the visit |
| 2. Exam | Checks vital signs, then looks, listens, feels and tests the part of the body involved | Wear clothes that make the area easy to reach |
| 3. Tests | Orders blood work, X-rays, scans or other tests only when they will change the decision | Ask what each test is for and when you'll get results |
| 4. Diagnosis | Puts it together into the most likely cause, plus others to rule out | Ask: "What else could it be?" |
| 5. Treatment | Recommends medicine, a procedure, a referral or watching and waiting | Ask about side effects, cost and the other options |
| 6. Follow-up | Checks whether the plan is working and adjusts it | Call if you get worse or aren't better when expected |
Sources
Checked November 11, 2026.