Fundamentals · chapter 30 · Pain Assessment
Responses to Pain
The 14 things this section of the textbook says that you are most likely to be asked about — quoted word for word, not retold. Then 6 practice questions with the reasoning.
Key points
Physiologic pain response
The physiologic response to pain is the body’s involuntary responses to a painful stimulus such as inflammation or changes in heart rate and blood pressure.
Sympathetic fight-or-flight
The role of the sympathetic nervous system is to respond to perceived stressful or dangerous situations. The main response from the sympathetic nervous system is the fight-or-flight response, which triggers the body to either run away from or fight a perceived threat.
Sympathetic pain signs
The sympathetic pain response involves many automatic bodily functions such as: enlarging pupils to improve vision; slowing digestion to allow the body to use energy in other places; and increasing heart rate and blood pressure to improve circulation (Cleveland Clinic, 2022b).
Nonverbal pain cues
Nurses may notice these nonverbal signs of pain in a patient even before the patient states they are in pain. Noticing sympathetic pain responses is especially important in patients who cannot communicate their pain.
Parasympathetic pain relief
These responses indicate to the nurse that the patient is experiencing adequate pain relief. In the same way that the nurse observes sympathetic responses to detect a patient’s pain, the nurse may observe parasympathetic responses to determine if pain interventions are effective.
Vital signs and pain
Pain can cause an increase in blood pressure, heart rate, and respiratory rate. Abnormal vital signs can occur without pain, so it is important that nurses perform other methods of assessment for pain as well.
Behavioral assessment importance
Nurses can easily observe behavioral responses to pain and can measure the severity of pain based on a patient’s behavior. Noticing behavioral pain responses is especially important in patients who cannot communicate their pain.
Behavioral pain responses
Behavioral pain responses may include: facial expressions, vocalization, movement, emotions, and interactions with others. Behavioral pain responses are often big reactions that others easily notice.
Vocalization in acute pain
This is called vocalization; and it most often occurs in acute pain of varying severity. Vocalization of pain includes crying, screaming, moaning, gasping, or grunting (Helmer et al., 2020).
FLACC pain scoring
The FLACC scale scores patients’ pain based on five criteria: facial expressions, body posture, activity, crying, and the ability to console (Trottier et al., 2022). The total score is 0 to 12, with each category receiving 0 to 2 points based on patient response.
Facial pain expressions
Frowning, closing eyes, clenching teeth, opening the mouth, biting lips, grimacing, furrowing eyebrows, and scowling can all be used to express pain (Cho Hong, 2020).
Body movement signs
Patients may demonstrate pain through movement such as guarding, touching the location of the pain, withdrawing from touch, or tremors (Cho Hong, 2020). Nurses may notice muscle tension and resistance to examination of the painful location.
Chronic pain isolation
Patients in chronic pain may withdraw from social interactions and become isolated. This can make the pain worse and contribute to deteriorating physical health in patients (Bannon et al., 2021).
Affective interventions
Interventions such as cognitive behavioral therapy, guided imagery, and meditation can help patients adjust their affective response to pain because they promote relaxation and decreased stress (Talbot et al., 2019). These interventions can help decrease negative emotions such as fear and anxiety while also decreasing the perception of pain.
Terms to know
- physiologic response to pain
- The physiologic response to pain is the body’s involuntary responses to a painful stimulus such as inflammation or changes in heart rate and blood pressure.
- autonomic nervous system
- The autonomic nervous system contains the sympathetic and parasympathetic nervous systems and regulates the involuntary physiologic responses of the body.
- fight-or-flight response
- The main response from the sympathetic nervous system is the fight-or-flight response, which triggers the body to either run away from or fight a perceived threat.
- vocalization
- This is called vocalization; and it most often occurs in acute pain of varying severity.
- affective response to pain
- The affective response to pain refers to the emotional interpretation of pain, such as how uncomfortable the pain is.
- algophobia
- When that phobia of pain is extreme, it’s called algophobia.
- catastrophizing
- The act of catastrophizing is the picturing the worst possible outcome for a situation (Cleveland Clinic, 2021).
Practice questions
Stuck on select-all-that-apply? How to take them one option at a time.
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Every question here, with the answer
A patient who is confused after surgery cannot clearly describe pain. The nurse notes an elevated heart rate and blood pressure before the patient says anything about discomfort. What is the nurse’s best interpretation?
- The findings are behavioral responses only and do not require pain assessment.
- The findings indicate adequate pain relief because the body is returning to normal functioning.
- The patient may be showing a sympathetic pain response, so the nurse should further assess for pain.
- The nurse should rely only on the patient’s verbal report because vital signs are not useful in pain assessment.
Answer: The patient may be showing a sympathetic pain response, so the nurse should further assess for pain.
Elevated heart rate and blood pressure can occur with a sympathetic response to pain, and this is especially important when a patient cannot communicate well. Vital signs should be used along with other pain assessment methods, not as the only measure.
The nurse reassesses a patient after a pain intervention. Which findings would support that the parasympathetic nervous system is taking over and the intervention may be effective? Select all that apply.
- The patient’s pupils are enlarged to improve vision.
- The patient’s heart rate and blood pressure are lower than before the intervention.
- The patient has more saliva and mucus to assist digestion and breathing.
- The patient’s blood pressure and heart rate increase to improve circulation.
- The patient’s digestion is supported as energy is directed toward breaking down food.
Answer: The patient’s heart rate and blood pressure are lower than before the intervention., The patient has more saliva and mucus to assist digestion and breathing., The patient’s digestion is supported as energy is directed toward breaking down food.
Parasympathetic responses occur during rest and relaxation and can indicate adequate pain relief. Enlarged pupils and increased heart rate and blood pressure are sympathetic responses associated with stress or pain, not parasympathetic recovery.
A patient reports pain, and the nurse wants to determine whether it is acute, chronic, or breakthrough pain. Which question is most appropriate?
- “Do you feel comfortable showing facial expressions of pain?”
- “Do you become quiet around other people when you are in pain?”
- “How long has the pain lasted?”
- “Are you worried that the pain will cause the worst possible outcome?”
Answer: “How long has the pain lasted?”
Asking how long the pain has lasted helps the nurse determine whether the pain is acute, chronic, or breakthrough. The other questions may address behavioral or affective responses, but they do not directly determine the pain category by duration.
The nurse is assessing an infant who is crying. Which nursing actions or interpretations are appropriate when evaluating possible pain? Select all that apply.
- Assume that all crying means the infant is in pain.
- Try comfort measures such as swaddling, feeding, and rocking.
- Use the FLACC scale to assess behavioral responses.
- Assess facial expressions, body posture, activity, crying, and ability to console.
- If comfort measures do not help, consider that the crying may be due to pain.
Answer: Try comfort measures such as swaddling, feeding, and rocking., Use the FLACC scale to assess behavioral responses., Assess facial expressions, body posture, activity, crying, and ability to console., If comfort measures do not help, consider that the crying may be due to pain.
The section emphasizes that infants primarily communicate through crying, but not all crying equals pain. The FLACC scale and comfort measures help the nurse assess whether crying may reflect pain.
A child with severe pain withdraws and resists when the nurse attempts to examine the painful area. What is the nurse’s best action?
- Use visual assessment and the child’s pain descriptors, and anticipate that pain relief may be needed before assessing the painful location.
- Delay all assessment until the child stops showing behavioral responses to pain.
- Tell the child that withdrawal from touch is not a typical pain response.
- Continue touching the painful area until the exact location is identified.
Answer: Use visual assessment and the child’s pain descriptors, and anticipate that pain relief may be needed before assessing the painful location.
Children may withdraw from touch because they fear that touching the area will worsen pain. Severe pain may require pain relief before assessing the painful location, and visual assessment and patient descriptors can support a comprehensive assessment without unnecessary touch.
A patient with chronic pain reports anxiety, fear, and increased stress related to the pain experience. Which interventions may help the patient adjust the affective response to pain? Select all that apply.
- Cognitive behavioral therapy
- Meditation
- Encouraging the patient to avoid any situation that could possibly cause pain
- Catastrophizing the pain to prepare for the worst outcome
- Guided imagery
Answer: Cognitive behavioral therapy, Meditation, Guided imagery
Cognitive behavioral therapy, guided imagery, and meditation can promote relaxation and decreased stress, helping with the emotional interpretation of pain. Avoidance and catastrophizing are described as problematic responses related to fear of pain, not therapeutic strategies.
Where every quote comes from
Section 30.2 Responses to Pain of Fundamentals of Nursing by Christy Bowen, Lindsay Draper, Heather Moore, OpenStax, 2024. Read the whole section free at openstax.org.
The textbook is licensed under CC BY-NC-SA 4.0. This page quotes it word for word and adds the headings, the order and the practice questions; references to the book's figures and stray spaces left by its formatting are removed. The page is shared under the same licence. Nothing here is sold.