What is Signs and symptoms?
[[File:Ternate Hospital - US physician examines man.jpg|thumb|A doctor uses a [[stethoscope]] to listen for ''signs'' of a medical problem in the [[organ]]s in a person's body, like the [[heart]] and [[lungs]]. If this person does not feel well because of a medical problem, he tells the doctor what he is feeling, like pain. What the person is feeling are the ''symptoms''.]] '''Signs and [[symptom]]s''' are two words that [[Medical doctor|doctors]] use to describe how a medical problem causes changes in a person's body. == Signs == A sign is a change in the body that can be heard, seen, felt, or smelled by a doctor. A sign may also be shown on medical tests like [[X-ray]]s or [[Urine test|urine]] [[blood test]]s.<ref>{{cite web |url=http://www.merriam-webster.com/medical/sign |title=Sign |author=<!--Staff writer(s); no by-line.--> |date=2015 |website=Merriam-Webster Medical Dictionary |publisher=Merriam-Webster, Inc |quote=}}</ref> For example: * A doctor can hear [[Breath sounds|changes in breathing sounds]] when he listens to a person's [[lung]]s with a [[stethoscope]]. These changes can be a sign of different [[breathing]] problems. *A doctor can see that a person has a [[bruise]] or [[Edema|swelling]]. These are signs of an [[injury]] to the body. *A doctor can feel that a [[bone]] seems crooked or broken. This may be a sign of a [[bone fracture]]. *A doctor can smell that a person's breath smells like fruit. This can be a sign of [[Hyperglycemia|very high blood sugar]].<ref>{{cite web |url=http://www.mayoclinic.org/diseases-conditions/hyperglycemia/basics/symptoms/con-20034795 |title=Hyperglycemia: Symptoms |author=<!--Staff writer(s); no by-line.--> |date=April 18, 2015 |website=MayoClinic.org |publisher=[[Mayo Clinic|The Mayo Clinic]] |accessdate=December 24, 2015 |quote=}}</ref> *A doctor can see on an X-ray that a bone is broken. This is a sign of a bone fracture. {{multiple image | align = right | direction = horizontal | image1 = Bullseye Lyme Disease Rash.jpg | width1 = 140 | captio