Medical-Surgical Nursing · Comprehensive Health Assessment and Physical Examination

Health History

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On this page 9 sections

In 30 seconds
Why this matters
The college version
Eli explains
Worked example
Key takeaway
Check yourself
Study tools
Sources & references

In 30 seconds

The is the systematic collection of a patient's health-related information — the "story" of their health — gathered through a structured interview, usually before or alongside the physical examination (Topic 4). Most of the history is : what the patient tells you about how they feel, what has happened, and what matters to them. It is the foundation of the nursing assessment: it captures the reason for seeking care, past and current problems, risk factors, medications, and the social context that shapes health. A good history also builds the trust that makes the rest of care possible — it is often the patient's first experience of being genuinely listened to.

The history and the physical exam work as a pair: the history tells the nurse what to look for, and the exam provides the objective findings that support or challenge the patient's story. Neither replaces the other.

Why this matters

Clues live in the story: Many conditions are identified primarily from the history; the exam and tests then confirm what the story suggests. A complete history organizes the interview so nothing important is skipped.
Safety: An incomplete history can miss allergies, medication interactions, or fall risks. Asking "any allergies?" is not enough — the nurse needs to know what reaction the person had.
Baseline and context: The history provides the patient's usual state (sleep, activity, function), which later findings are compared against.
Therapeutic value: The interview itself builds rapport, reduces anxiety, and lets patients participate in their own care.
Legal record: The documented history is a legal document that must be complete, factual, and timely.

The college version

Core Concepts

Components of a health history

Standard components (variations exist by facility and setting):

Biographical data: name, age, sex assigned at birth and gender identity as applicable, preferred language, contact information.
(CC): the reason for seeking care, recorded in the patient's own words (e.g., "My chest feels tight when I walk").
(HPI): the full story of the current problem — when it started, how it developed, what makes it better or worse.
Past medical and surgical history: chronic conditions, hospitalizations, surgeries, injuries, childhood illnesses.
Current medications: prescription, over-the-counter, herbal products, and supplements — with dose and frequency as reported.
Allergies: substance plus the specific reaction experienced (e.g., "penicillin — hives"), which is different from an intolerance.
Family history: health problems in close relatives, especially conditions with a known pattern of inheritance.
Social and environmental history: living situation, occupation, support system, habits (tobacco, alcohol, substance use), access to care, spiritual or cultural preferences.
(ROS): a symptom inventory by body system (e.g., cardiovascular, respiratory, gastrointestinal) to catch problems the patient did not think to mention.

Organizing the present illness: PQRST and OLD CARTS

Mnemonics help the nurse explore a symptom completely without forgetting a dimension. PQRST asks about Provoking/palliating factors, Quality, Region/radiation, Severity, and Timing. OLD CARTS asks about Onset, Location, Duration, Character, Aggravating factors, Relieving factors, Treatment tried, and Severity. These are educational frameworks — different programs teach slightly different versions, and the point is to cover the full picture of the symptom.

Subjective versus objective data

Subjective data is what the patient reports ("I feel dizzy"). is what the nurse observes or measures (blood pressure reading, skin color, gait). The health history is mostly subjective; the physical exam collects objective data. Both are documented, and they are compared — a patient who reports dizziness with a normal blood pressure reading still has a report that must be taken seriously.

Interviewing skills and adaptations

The interview uses the communication skills from Topic 2: open-ended questions first to get the story, then focused questions to fill gaps. Practical adaptations include: conducting the interview in private; giving the patient time; facing a patient with hearing loss and minimizing background noise; using a professional interpreter when language differs (per facility policy); and for a patient with cognitive impairment, gathering from family or caregivers — documented as such, since it is secondhand. Older adults may need extra time and may report symptoms differently.

Documentation

Document the history completely, chronologically, and factually. Quote the patient for the chief complaint, record the specific allergy reaction, and note who provided the information (patient, family, caregiver) and any factors affecting reliability. Documentation is a legal record, and each facility has its own format and policy.

Common Confusions

Do not confuse	With	Difference
Subjective data	Objective data	Subjective is what the patient says; objective is what the nurse observes or measures
Chief complaint	History of present illness	The CC is the one-line reason in the patient's words; the HPI is the full story of that problem
Allergy	Intolerance	An allergy is an immune-type reaction (e.g., hives, swelling); an intolerance is a side effect (e.g., stomach upset) — never chart an intolerance as an allergy
Health history	Physical examination	The history is the interview (mostly subjective); the exam is hands-on (objective) — the two complement each other
Patient report	Collateral report	The patient is the primary source; family/caregiver information is secondary and labeled as such
The ROS	The HPI	The ROS is a broad, quick sweep of all systems; the HPI is an in-depth story of one problem

Eli explains

The same idea, in plain words

Explain it like I’m 10

A health history is like telling the nurse the whole story of your health, from the beginning to today. The nurse asks what's wrong now, what has happened before, what medicines you take, and how you live, so the care team knows what to look for. It's the "talk" part of the checkup, and the story you tell is just as important as the exam.

Worked example

Ms. Delgado, 68, is admitted with shortness of breath. The nurse asks, "Tell me what brought you to the hospital" (open-ended). Ms. Delgado says, "My chest feels tight and I can't catch my breath." Using PQRST, the nurse explores: Provoking/palliating — worse when lying flat, better sitting upright; Quality — a tightness, not sharp; Region/radiation — center of the chest, no radiation; Severity — "about a 7 out of 10"; Timing — started two days ago, worse at night. The nurse then asks about medications; Ms. Delgado lists a "water pill" but not the dose. The nurse asks about allergies: "Penicillin — I broke out in hives once." The nurse writes that down as an allergy with the reaction. Because Ms. Delgado reports being confused at night and her daughter is present, the nurse gathers additional history from the daughter and labels it as collateral information. The nurse documents the chief complaint in Ms. Delgado's own words and summarizes the story back to her. (Educational illustration of interview organization — no diagnosis is made or implied here.)

Key takeaways

The chief complaint is recorded in the patient's own words, not the nurse's diagnosis.
The HPI is the detailed story of the current problem; the ROS is a quick sweep of all body systems.
Always ask about allergies AND the specific reaction — "allergy" without a reaction is incomplete information.
Include over-the-counter and herbal products in the medication list, not just prescriptions.
Subjective = what the patient says; objective = what the nurse observes or measures.
Collateral (family/caregiver) information is valuable but must be labeled as such.
The interview builds trust — rushing it produces a poorer history.

Check yourself

6 review questions from the chapter. Try each one, then open the answer.

What is the difference between the chief complaint and the history of present illness?
Show answer
The chief complaint is the brief reason for seeking care in the patient's own words; the HPI is the detailed story of that complaint (onset, quality, aggravating/relieving factors, severity, timing).
Why must the nurse ask about the reaction when a patient reports an allergy?
Show answer
The reaction distinguishes an allergy (immune-type response such as hives, which is important to document and flag) from an intolerance (side effect such as stomach upset) — the two carry different safety implications.
Give an example of subjective data and an example of objective data from one assessment.
Show answer
Example: subjective — "I feel dizzy when I stand up"; objective — blood pressure measured after standing (any comparable pairing is correct).
What are the two mnemonics commonly used to explore a symptom fully, and what does each letter stand for in one of them?
Show answer
PQRST (Provoking/palliating, Quality, Region/radiation, Severity, Timing) and OLD CARTS (Onset, Location, Duration, Character, Aggravating, Relieving, Treatment, Severity).
Why is collateral information from a family member labeled differently in the record?
Show answer
Because it is secondhand information that may be incomplete or biased; labeling it keeps the record accurate about the source.
Why should the chief complaint be recorded in the patient's own words?
Show answer
The patient's words capture their experience without the nurse's interpretation, which keeps the record accurate and unbiased.

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Study tools & related lessonsKey vocabulary · Related

Key vocabulary

Health history: The structured collection of a patient's health information through interview
Subjective data: Information the patient reports (feelings, symptoms, experiences)
Objective data: Information the nurse observes or measures
Chief complaint: The reason for seeking care, in the patient's own words
History of present illness: The detailed story of the current problem
Review of systems: A symptom inventory by body system
Collateral information: History provided by family or caregivers
PQRST / OLD CARTS: Mnemonics for fully exploring a symptom

Sources & references

openstax.org — Medical Surgical Nursing

This lesson was adapted from the open educational references above; their licenses and attributions are preserved. See Copyright & Licensing.

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