Physical Examination is the systematic direct assessment of the body using observation, palpation, percussion, auscultation and other appropriate techniques to identify physical signs and assess physiological or functional status. It is a component of Clinical Examination and is commonly used alongside Medical History, Vital Signs and diagnostic investigations. A Physical Examination can be general, covering multiple body systems, or focused on a particular complaint or suspected condition. The findings may help identify abnormalities such as respiratory distress, neurological deficits, inflammation, swelling, abnormal heart sounds, impaired circulation or musculoskeletal dysfunction.
Physical Examination begins with observation, which can provide immediate information about general appearance, posture, movement, breathing, skin colour, distress and level of consciousness. More focused techniques then assess relevant anatomical and physiological systems. Palpation can identify tenderness, temperature, texture, masses, pulses and organ enlargement. Percussion can help assess underlying structures, while auscultation can detect physiological sounds. Neurological and musculoskeletal examinations may include assessment of strength, sensation, reflexes, coordination, balance and range of movement. The sequence is adapted to the patient and clinical question rather than being an inflexible universal routine.
Different body systems require different examination methods. Cardiovascular examination can include assessment of pulse, peripheral perfusion, blood pressure and heart sounds. Respiratory examination can involve observation of respiratory effort, chest movement and auscultation. Abdominal examination can assess inspection, bowel sounds where relevant, palpation and percussion. Neurological examination may assess mental status, cranial nerve function, motor function, sensation, reflexes and coordination. Musculoskeletal examination commonly considers alignment, range of movement, strength, stability, gait and functional performance. These examinations generate signs that must be interpreted according to the person's symptoms and broader clinical context.
The diagnostic usefulness of Physical Examination varies considerably between individual signs. Some findings have strong associations with particular conditions, while many are non-specific. Diagnostic accuracy can be expressed using sensitivity, specificity, likelihood ratios and predictive values, although these measures depend on study design and clinical population. Examiner skill and inter-observer variation can influence findings, and certain examination manoeuvres have limited reliability. The evidence base for physical signs is therefore heterogeneous. Clinicians should understand the limitations of individual findings and avoid treating an isolated sign as definitive when its diagnostic performance does not justify that conclusion.
Physical Examination is also important for identifying deterioration and determining urgency. Signs such as altered consciousness, increased respiratory effort, poor peripheral perfusion, severe neurological deficit or significant bleeding can affect immediate management. Examination may be repeated after treatment to assess response. In emergency settings, rapid assessment prioritises threats to life, whereas outpatient examinations may be more detailed and condition-specific. In rehabilitation, examination may concentrate on function and movement rather than diagnosis alone. The same fundamental techniques can therefore serve different purposes depending on the clinical setting and the patient's needs.
Professional conduct is integral to Physical Examination. The clinician should explain what will happen, obtain appropriate consent, maintain privacy and dignity, use suitable draping and minimise unnecessary exposure. Intimate examinations require particular care and adherence to professional standards. Infection prevention, hand hygiene and appropriate protective equipment are important where exposure to infectious material is possible. Examination findings should be documented in a way that is sufficiently precise for another clinician to understand what was assessed and what was found. When an examination cannot be completed, that limitation may also be clinically relevant.
Technology increasingly complements Physical Examination. Devices can measure physiological parameters, provide images or amplify sounds, while point-of-care ultrasound can extend bedside assessment in trained hands. Nevertheless, technology does not remove the need for physical assessment because measurements require interpretation and can miss clinically relevant features outside their intended scope. Physical Examination can also provide immediate information before investigations are available. Conversely, clinicians should avoid overreliance on traditional examination rituals when evidence indicates that a particular manoeuvre contributes little to diagnosis or management. Modern practice therefore combines established bedside skills with appropriately selected technology.
Physical Examination is sometimes incorrectly treated as synonymous with a full head-to-toe assessment. In reality, the appropriate extent depends on the clinical question, patient condition and setting. It is also not equivalent to Clinical Examination as a whole, because Clinical Examination can include the broader assessment process involving history and other clinical information. A normal Physical Examination does not exclude all disease, particularly when a condition produces subtle signs or abnormalities not detectable by the chosen examination. Its enduring value lies in providing direct clinical information that can refine diagnostic probability, identify severity, guide investigations and monitor changes over time.
