How to Check Symptoms Online

Use trusted online symptom checkers from medical sources to learn about possible causes of your symptoms.

Steps

1
Choose a reliable symptom checker website
like the Mayo Clinic, WebMD, or the CDC website. These sites use trusted medical information.
2
Select the part of your body that is bothering you
from an interactive diagram. Most symptom checkers start with a body map.
3
Answer questions about your symptoms
including when they started, how severe they are, and what makes them better or worse.
4
Review the possible conditions
the tool suggests. Symptom checkers give a list of possibilities from common to serious.
5
Contact your doctor if you are concerned
about the results. Online symptom checkers are not a replacement for medical advice.

Are online symptom checkers accurate?Show

Symptom checkers can suggest possible causes but are not always accurate. They work best for common conditions.

Is WebMD a reliable source for symptoms?Show

WebMD is a popular resource but its information is general. Always confirm with a healthcare provider for your specific situation.

Can I check symptoms for my child online?Show

Yes, most symptom checkers have a pediatric option. You select the child age range for more accurate results.

Should I go to the ER based on an online symptom check?Show

No, if you think you have an emergency, call 911 or go to the ER. Do not rely on an online tool for emergency decisions.

Written by the HowToDoStuff.online editorial team. Last updated May 18, 2026.