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CNA · Basic Nursing Skills · 8 min read

Observing, Reporting and Recording Changes and Pain

In this lesson you will
  • Differentiate between objective data and subjective data gathered during routine resident care.
  • Identify urgent physical and behavioral changes that require immediate reporting to the nurse.
  • Describe the nurse aide's role in observing, measuring, and reporting pain, providing comfort measures, and maintaining accurate legal documentation.

Collecting Clinical Data: Objective Versus Subjective

As a nurse aide, you spend more direct time with residents than any other member of the healthcare team. Because of this close contact, you are in the best position to notice subtle changes in a resident's physical condition, mood, and daily abilities. Observation begins the moment you enter a resident's room and continues through every interaction. Gathering information accurately requires understanding the two main categories of health data: objective data and subjective data.

Objective data, also referred to as signs, consist of findings you directly observe with your senses or measure; not every observation is measurable. You collect objective data using your sense of sight, hearing, touch, and smell. For example, measuring a resident's pulse rate provides a concrete, factual number, while looking at a resident's arm and observing a skin rash is an observation made through sight. You might hear a resident wheezing or notice an unusual odor from a wound; report these observations to the nurse without deciding whether the wound is infected. It is critical to remember that the nurse aide must never use the sense of taste to make clinical observations.

Subjective data, also referred to as symptoms, represent information reported directly by the resident that you cannot see, hear, touch, or measure for yourself. A resident stating that their knee aches is an everyday example of collecting subjective data. Because you cannot feel what the resident is feeling, you must rely on what they share with you. Both types of information are vital to the healthcare team, and you must report both accurately to the nurse without guessing, assuming, or diagnosing.

Comparison of Objective and Subjective Data
Data TypeDefinitionSenses UsedClinical Examples
Objective Data (Signs)Factual observations directly seen, heard, felt, smelled, or measuredSight, hearing, touch, and smell (never taste)Measuring a resident's pulse rate; observing a skin rash
Subjective Data (Symptoms)Information reported by the resident that cannot be directly seen or measuredResident's verbal reportA resident stating that their knee aches
Exam tip. State competency exams often test whether an item is a sign or a symptom. Remember: if the aide observes or measures it directly (such as counting a pulse rate or seeing a rash), it is objective data. If the resident reports how they feel (such as stating an elbow hurts), it is subjective data.

Common mistakes

  • Assuming that pain is just an expected, normal part of growing older instead of asking residents regularly and reporting complaints.
  • Attempting to evaluate what is causing a resident's pain or altering their care plan instead of immediately reporting findings to the nurse.
  • Erasing an error or using correction fluid on paper medical charts rather than drawing a single line through the mistake, correcting it, and initialing and dating it per facility policy.
  • Failing to report a fall because the resident insists they are unhurt and feel fine.

Key points

  • Objective data (signs) are factual observations gathered using sight, hearing, touch, and smell, whereas subjective data (symptoms) are reported by the resident.
  • The nurse aide must never use the sense of taste to make clinical observations.
  • Urgent conditions, such as sudden stroke signs, chest pain, difficulty breathing, cyanosis, sudden changes in responsiveness, and falls, require immediate reporting to the nurse.
  • Pain is a subjective experience, not a normal part of aging, and can present through verbal descriptions, facial grimaces, guarding, vocalizations, or sudden agitation in dementia.
  • Nurse aides provide non-pharmacological comfort measures such as repositioning, back rubs authorized by the care plan, straightening linens, and quiet environments, but cannot give pain medications or evaluate causes.
  • Documentation must be completed only after care is performed, kept neat and legible, corrected without erasures or correction fluid, and maintained under strict HIPAA privacy rules.

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Original lesson written for CNA practice · updated October 15, 2026. Exam names are trademarks of their owners; tests.global is not affiliated with them.