Core Healthcare Terms

#Symptoms and diagnosis

Symptom means an experience noticed by a person, such as nausea or discomfort. A symptom describes what is experienced, not necessarily why it happens. For timing, intensity and context, see Describing Symptoms Clearly (/describing-symptoms-clearly).

Diagnosis means a clinical conclusion about a health problem based on relevant assessment. A working diagnosis is provisional and may change with further information. For the limits of online descriptions, see Health Information Is Not a Diagnosis (/health-information-is-not-a-diagnosis).

#Tests and referrals

Test means a procedure or measurement used to provide health information. Tests may investigate, screen or monitor, and their results need context. They do not answer every question perfectly. For purpose, preparation and follow-up, see Questions Before a Test (/questions-before-a-test).

Referral means a request for another professional or service to provide assessment, advice or care. It does not itself confirm a condition or its seriousness. For questions about arrangements and responsibilities, see Understanding a Referral (/understanding-a-referral).

#Treatment and monitoring

Treatment means an intervention intended to improve or manage health. It can involve medicines, procedures or other approaches, depending on the problem. Benefits and harms vary. For goals, alternatives and review, see Questions Before Treatment (/questions-before-treatment).

Monitoring means checking a condition or treatment over time. It may involve symptoms, examination findings or tests, depending on the situation. Monitoring is not automatically a sign that something is worsening. For its place in ongoing care, see Reading Your Care Plan (/reading-your-care-plan).

#Evidence and consent

Evidence means information used to support or challenge a claim. The strength of scientific evidence depends on its quality, relevance and consistency, not simply the number of references. For interpreting claims and uncertainty, see How to Read a Health Explainer (/how-to-read-a-health-explainer).

Consent means voluntary permission for a specific action, based on an appropriate understanding of what is proposed. Consent to one action is not permission for every other action. For involvement and privacy, see Supporting Someone Through Care (/supporting-someone-through-care).

#Common misunderstandings

Healthcare terms often sound more definite than they are. A symptom is something a person experiences, such as nausea; a sign is something observed or measured, such as a raised temperature. Neither necessarily identifies the cause on its own. A diagnosis may be provisional, meaning it is the current explanation while more information is gathered.

A “positive” test result usually means the test detected what it was looking for, not that the news is good. A “negative” result does not always rule out a condition. Results need to be interpreted alongside symptoms, medical history and the test’s limitations.

“Chronic” generally describes a long-lasting condition, not necessarily a severe one. “Acute” often refers to a condition that starts suddenly or lasts a short time, rather than how serious it is. Likewise, a referral means another service or professional is being asked to help; it does not by itself confirm a serious diagnosis.

#Questions worth asking a clinician

• How do my reported symptoms differ from a diagnosis, and what information would help establish their clinical explanation?
• What is this test intended to clarify, and what can its results tell us or leave uncertain?
• What question would a referral address, and how does that differ from monitoring my symptoms over time?
• How strong is the evidence supporting this diagnosis or proposed treatment, and how relevant is it to my situation?
• Which specific tests, treatments or research procedures am I consenting to, and which would require separate consent?