Please tell me how to write a detailed case history of a patient.
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A detailed case history is a structured clinical narrative. It records what the patient reports, relevant observations, and your clinical interpretation without inventing information.
Standard format
1. Identification data
Write the basic particulars:
- Name, age, sex/gender
- Occupation
- Address or residence
- Date and time of admission or consultation
- Informant and reliability of history
- Hospital or registration number, if required
Example:
Mr A.B., a 56-year-old male farmer from [place], was admitted on 12 October 2026. History was provided by the patient and was considered reliable.
Mr A.B., a 56-year-old male farmer from [place], was admitted on 12 October 2026. History was provided by the patient and was considered reliable.
2. Chief complaints
List the patient’s main problems with their duration. Keep this brief and use the patient’s presenting symptoms.
Example:
- Breathlessness for 5 days
- Productive cough for 7 days
- Fever for 4 days
Do not write a diagnosis here, such as “pneumonia for 7 days,” unless it is already a confirmed established diagnosis.
3. History of present illness
This is the central part of the case history. Describe each chief complaint in chronological order, beginning with when the patient was last well.
For every symptom, clarify:
- Onset: sudden or gradual
- Duration and progression: improving, worsening, intermittent, or constant
- Site and radiation, where relevant
- Character or quality
- Severity and effect on daily activity
- Timing: day/night pattern, relation to meals, exercise, posture, menstruation, etc.
- Aggravating and relieving factors
- Associated symptoms
- Treatment already taken and response
- Relevant negative history, meaning important absent symptoms
A useful symptom framework is SOCRATES:
- Site
- Onset
- Character
- Radiation
- Associated symptoms
- Timing
- Exacerbating/relieving factors
- Severity
Example:
The patient was apparently well 7 days before admission, when he developed cough of gradual onset. The cough was productive, with approximately half a cup of yellowish sputum daily, without hemoptysis. Four days later, he developed intermittent high-grade fever associated with chills and rigors. He also developed progressive breathlessness, initially on exertion and later while walking indoors. There was no history of chest pain, wheeze, orthopnea, paroxysmal nocturnal dyspnea, leg swelling, weight loss, or known contact with tuberculosis. He took over-the-counter antipyretics with temporary relief.
The patient was apparently well 7 days before admission, when he developed cough of gradual onset. The cough was productive, with approximately half a cup of yellowish sputum daily, without hemoptysis. Four days later, he developed intermittent high-grade fever associated with chills and rigors. He also developed progressive breathlessness, initially on exertion and later while walking indoors. There was no history of chest pain, wheeze, orthopnea, paroxysmal nocturnal dyspnea, leg swelling, weight loss, or known contact with tuberculosis. He took over-the-counter antipyretics with temporary relief.
Write in paragraphs, not as disconnected points.
4. Past history
Include previous illnesses and conditions relevant to the present problem:
- Hypertension, diabetes, asthma/COPD, tuberculosis, heart disease, kidney/liver disease, epilepsy, thyroid disease, cancer, etc.
- Previous similar episodes
- Previous hospital admissions
- Operations, trauma, and blood transfusions
- Psychiatric illness, if relevant
- Immunization history, where relevant
- Current and previous medications, including non-prescription and herbal drugs
- Drug, food, or environmental allergies, and the reaction caused
Example:
The patient has had type 2 diabetes mellitus for 8 years and hypertension for 5 years. There is no past history of tuberculosis, bronchial asthma, ischemic heart disease, or previous similar episodes. He has not undergone any surgery or blood transfusion. He takes metformin and amlodipine regularly. No known drug allergy.
The patient has had type 2 diabetes mellitus for 8 years and hypertension for 5 years. There is no past history of tuberculosis, bronchial asthma, ischemic heart disease, or previous similar episodes. He has not undergone any surgery or blood transfusion. He takes metformin and amlodipine regularly. No known drug allergy.
5. Personal history
This documents lifestyle and functional background:
- Diet and appetite
- Sleep
- Bowel and bladder habits
- Substance use: tobacco, alcohol, recreational drugs
- Physical activity
- Sexual history when clinically relevant and sensitively obtained
- Travel, occupational, environmental, or animal exposures
- Menstrual, obstetric, and contraceptive history where relevant
Quantify substance use whenever possible.
Example:
He has smoked 20 cigarettes daily for 25 years, equivalent to 25 pack-years. He consumes alcohol occasionally. Appetite is reduced since onset of illness; sleep is disturbed by cough. Bowel and bladder habits are normal.
He has smoked 20 cigarettes daily for 25 years, equivalent to 25 pack-years. He consumes alcohol occasionally. Appetite is reduced since onset of illness; sleep is disturbed by cough. Bowel and bladder habits are normal.
6. Family history
Record diseases in first-degree relatives, ages, and ages/causes of death if applicable. Ask specifically about conditions that may be inherited or shared through environment.
- Diabetes, hypertension, premature heart disease
- Tuberculosis or other infectious contacts
- Asthma/allergy
- Cancer
- Psychiatric illness
- Genetic disorders
The American Medical Association advises documenting relatives’ ages or age at death, ethnicity where relevant, and chronic diseases in the family history. AMA family-history guidance
Example:
Father had diabetes mellitus and died of myocardial infarction at 68 years. Mother is alive and has hypertension. No family history of tuberculosis, asthma, malignancy, or similar illness.
Father had diabetes mellitus and died of myocardial infarction at 68 years. Mother is alive and has hypertension. No family history of tuberculosis, asthma, malignancy, or similar illness.
7. Socioeconomic and environmental history
Often included separately in detailed academic cases:
- Type of home, crowding, ventilation, sanitation
- Water source
- Education and socioeconomic circumstances
- Occupational hazards
- Exposure to dust, chemicals, smoke, animals, sick contacts, travel, or vectors
Example:
The patient lives in a moderately ventilated house with four family members. There is no known exposure to tuberculosis, industrial dust, or livestock.
The patient lives in a moderately ventilated house with four family members. There is no known exposure to tuberculosis, industrial dust, or livestock.
8. Review of systems
Ask about symptoms from other body systems that were not fully covered in the HPI. Keep it targeted, not a long checklist.
- General: weight loss, appetite loss, fatigue, fever, night sweats
- Cardiovascular: chest pain, palpitations, edema, syncope
- Respiratory: cough, sputum, wheeze, hemoptysis
- Gastrointestinal: nausea, vomiting, abdominal pain, altered bowel habits
- Genitourinary: dysuria, frequency, hematuria
- Neurological: headache, seizures, weakness, sensory symptoms
- Musculoskeletal/skin: joint pain, rash, swelling
9. Physical examination
If the assignment asks for a full case record, follow history with examination.
- General condition and level of consciousness
- Vital signs: temperature, pulse, BP, respiratory rate, oxygen saturation
- General examination: pallor, icterus, cyanosis, clubbing, lymph nodes, edema, hydration, nutrition
- Systemic examination: respiratory, cardiovascular, abdomen, nervous system, musculoskeletal system
- Relevant local examination
Document only what you observed. Do not write “normal” without examining.
10. Case summary
Summarize the key positive and negative findings in one short paragraph.
Example:
Mr A.B., a 56-year-old man with diabetes, hypertension, and a 25 pack-year smoking history, presented with acute febrile productive cough and progressively worsening breathlessness for 7 days. He had no hemoptysis, chest pain, or symptoms of heart failure. Examination and investigations are awaited.
Mr A.B., a 56-year-old man with diabetes, hypertension, and a 25 pack-year smoking history, presented with acute febrile productive cough and progressively worsening breathlessness for 7 days. He had no hemoptysis, chest pain, or symptoms of heart failure. Examination and investigations are awaited.
11. Provisional diagnosis and differentials
State the most likely diagnosis and a few reasonable alternatives after the history and examination.
Example:
- Provisional diagnosis: Community-acquired pneumonia
- Differential diagnoses: Acute exacerbation of COPD, acute bronchitis, pulmonary tuberculosis, heart failure
Do not force a diagnosis if the information is insufficient.
Writing principles
- Use clear chronological language: “The patient was apparently well until…”
- Separate symptoms reported by the patient from findings you observed.
- Use quotation marks for important patient wording, if needed.
- Include relevant negatives, but avoid excessive irrelevant negatives.
- Avoid judgemental language such as “noncompliant.” Instead write: “The patient reports missing medication doses approximately 3 times per week because of cost.”
- Keep confidential identifiers out of cases used for teaching or sharing.
- Clearly state if information is unavailable: “History of prior vaccination could not be ascertained.”
A complete history generally includes the chief complaint, HPI, past medical and surgical history, allergies, social and family history, and review of systems, consistent with standard clinical-history structure described in Campbell-Walsh Urology.
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