Vital signs

Vital signs reflect essential body functions, including your heartbeat, breathing rate, temperature, and blood pressure. Your health care provider may watch, measure, or monitor your vital signs to check your level of physical functioning.

Normal vital signs change with age, sex, weight, exercise capability, and overall health.

Normal vital sign ranges for the average healthy adult while resting are:

Blood pressure: 90/60 mm Hg to 120/80 mm Hg
Breathing: 12 to 18 breaths per minute
Pulse: 60 to 100 beats per minute
Temperature: 97.8°F to 99.1°F (36.5°C to 37.3°C); average 98.6°F (37°C)

Open References

References

Ball JW, Dains JE, Flynn JA, Solomon BS, Stewart RW. Vital signs and pain assessment. In: Ball JW, Dains JE, Flynn JA, Solomon BS, Stewart RW, eds. Seidel's Guide to Physical Examination. 9th ed. St Louis, MO: Elsevier; 2019:chap 6.

Simel DL. Approach to the patient: history and physical examination. In: Goldman L, Schafer AI, eds. Goldman-Cecil Medicine. 26th ed. Philadelphia, PA: Elsevier; 2020:chap 6.

Blood pressure check - illustration
To measure blood pressure, your doctor uses an instrument call a sphygmomanometer, which is more often referred to as a blood pressure cuff. The cuff is wrapped around your upper arm and inflated to stop the flow of blood in your artery. As the cuff is slowly deflated, your doctor uses a stethoscope to listen to the blood pumping through the artery. These pumping sounds register on a gauge attached to the cuff. The first pumping sound your doctor hears is recorded as the systolic pressure, and the last sound is the diastolic pressure.
Blood pressure check
illustration
Thermometer temperature - illustration
Fever is an important part of the body's defense against infection. Most bacteria and viruses that cause infections in humans thrive best at 98.6 degrees F (37 degrees C). Raising the body temperature a few degrees can help the body fight the infection. In addition, a fever activates the body's immune system to make more white blood cells, antibodies, and other infection-fighting agents.
Thermometer temperature
illustration
How to take your pulse - illustration
How to take your pulse. 1. Place the tips of your index and middle finger on the inside of your wrist below the base of your thumb. 2. Press lightly. You will feel the blood pulsing beneath your fingers. 3. Use a watch or clock with a second hand. Count the beats you feel for 1 minute. Or count the beats for 30 seconds and multiply by 2. This is also called your pulse rate.
How to take your pulse
illustration

Blood pressure check - illustration
To measure blood pressure, your doctor uses an instrument call a sphygmomanometer, which is more often referred to as a blood pressure cuff. The cuff is wrapped around your upper arm and inflated to stop the flow of blood in your artery. As the cuff is slowly deflated, your doctor uses a stethoscope to listen to the blood pumping through the artery. These pumping sounds register on a gauge attached to the cuff. The first pumping sound your doctor hears is recorded as the systolic pressure, and the last sound is the diastolic pressure.
Blood pressure check
illustration
Thermometer temperature - illustration
Fever is an important part of the body's defense against infection. Most bacteria and viruses that cause infections in humans thrive best at 98.6 degrees F (37 degrees C). Raising the body temperature a few degrees can help the body fight the infection. In addition, a fever activates the body's immune system to make more white blood cells, antibodies, and other infection-fighting agents.
Thermometer temperature
illustration
How to take your pulse - illustration
How to take your pulse. 1. Place the tips of your index and middle finger on the inside of your wrist below the base of your thumb. 2. Press lightly. You will feel the blood pulsing beneath your fingers. 3. Use a watch or clock with a second hand. Count the beats you feel for 1 minute. Or count the beats for 30 seconds and multiply by 2. This is also called your pulse rate.
How to take your pulse
illustration

A Closer Look

Talking to your MD

Self Care

Tests for Vital signs

Review Date: 1/16/2021

Reviewed By: Linda J. Vorvick, MD, Clinical Associate Professor, Department of Family Medicine, UW Medicine, School of Medicine, University of Washington, Seattle, WA. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.

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Health Library

Vital signs

References

Blood pressure check - illustration

Blood pressure check

Thermometer temperature - illustration

Thermometer temperature

How to take your pulse - illustration

How to take your pulse