Pain & Discomfort
Author(s): Laura Porter, PhD, Scott Ravyts
Editor(s): Beth Gardini Dixon, PsyD, Sharla Wells-DiGregorio, PhD
Introduction
Pain is an unpleasant sensation that can range from mild discomfort to excruciating suffering. Despite advances in treatments for cancer pain, the prevalence of pain remains high, particularly for patients with advanced disease. Almost two-thirds of patients with advanced cancer report pain, and half report pain of moderate to severe intensity.
Pain is a complex, multidimensional experience that impedes patients’ ability to perform valued activities and increases the risk of psychological distress. Pain is often inconsistent in nature, fluctuating in frequency, intensity, and sensory qualities. This unpredictability can make it challenging for patients to manage, leading to a perceived lack of control. In addition to having a biological basis, pain also affects and is affected by psychological and social factors. Thus, recent models maintain that cancer pain is best understood and treated using a biopsychosocial model that accounts for thoughts, emotions, behaviors, and the social context.
Guidelines
- NCCN Guidelines Adult Cancer Pain Guidelines V.2.20241
- National Cancer Institute Cancer Pain (PDQ®)–Health Professional Version: https://www.cancer.gov/about-cancer/treatment/side-effects/pain/pain-hp-pdq
- World Health Organization Guidelines for the Pharmacological and Radiotherapeutic Management of Cancer Pain in Adults and Adolescents: https://www.who.int/publications/i/item/9789241550390
Screening/Risk Factors
- Numerical Rating Scale: pain severity rated from 0 (no pain at all) to 10 (worst pain possible) (https://www.va.gov/PAINMANAGEMENT/docs/Pain_Numberic_Rating_Scale.pdf)
- PEG: three items (pain severity, interference with enjoyment of life, and interference with general activities, each rated from 0 to 10) (https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2686775/)
- The Faces Pain Rating Scale – Revised (https://wongbakerfaces.org/wp-content/uploads/2016/05/FACES_English_Blue_w-instructions.pdf) – nonverbal assessment of pain severity
Psychosocial Risk Factors
- Pain Catastrophizing Scale – assesses catastrophic thinking related to pain, which is highly predictive of pain severity and distress (https://painbc.ca/sites/default/files/events/materials/Pain_Catastrophizing_Scale.pdf)
- Self-efficacy for pain scale- 10 items assessing patients’ confidence in managing pain and its effects; https://novopsych.com.au/wp-content/uploads/2021/03/pseq_pain-self-efficacy-questionaire-pdf-template.pdf
- Kinesiophobia (fear of movement) (https://novopsych.com.au/wp-content/uploads/2020/05/tsk_assessment.pdf)
- Factors related to undertreatment of pain (From NCCN guidelines):
- elderly; women
- minorities (language, cultural barriers)
- history of substance use problems, psychiatric illness, neuropathic pain
- fear of addiction.
- Pre-existing chronic pain
- Other significant medical conditions that may contribute to pain
- Social support – availability of family or others to provide emotional and/or practical support. Is anyone assisting patient with pain management and medications at home?
Evaluation and Diagnosis
Pain Severity and Interference
- Brief Pain Inventory (http://www.npcrc.org/files/news/briefpain_short.pdf) – assesses pain severity (current, usual, least and worst in past 24 hours) and location, and pain interference
McGill Pain Questionnaire
(https://journals.lww.com/pain/Abstract/1975/09000/The_McGill_Pain_Questionnaire__Major_properties.6.aspx)- includes 3 major classes of word descriptors (sensory, affective and evaluative) that are used by patients to specify subjective pain experience
- Ask about pain at rest and with movement
Pain history (From NCCN Guidelines)1
- When did it start?
- How long has it been present?
- Has it changed in any way?
- Is it intermittent or constant?
- Do you have other symptoms?
- What makes the pain worse? Better?
- What has been tried to treat the pain? Has it helped? Are there side effects? What are the scheduled doses?
Pain-Related Problems
- Psychological distress: Center for Epidemiologic Studies – Depression (CESD) (https://pubmed.ncbi.nlm.nih.gov/20843557/); Hospital Anxiety and Depression Scale (HADS) (https://pubmed.ncbi.nlm.nih.gov/6880820/)
- Insomnia Severity Index https://www.ons.org/sites/default/files/InsomniaSeverityIndex_ISI.pdf
Cultural Considerations
Racial disparities in pain have been well-documented with individuals from underserved backgrounds being more likely to receive less aggressive treatments for their pain despite reporting greater levels of pain than their White counterparts. Implicit bias from medical providers and barriers to access for healthcare for underserved populations are believed to drive these disparities in pain. An understanding of a patient’s culture and its influence on pain communication, coping, and acceptability of different treatments allows for patient-centered, culturally-sensitive, treatment interventions. Additionally, adhering to established clinical guidelines for pain management can reduce individual discretion and minimize implicit bias affecting patient outcomes.
Treatment
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Conclusion
While recommended by guidelines, nonpharmacological approaches to pain management are currently underutilized. They have a number of advantages including:
- Can be used in combination with pain medication and potentially lead to decreased need for pain medication
- Not associated with negative side effects common to pain medication (e.g., constipation, drowsiness)
- Can address psychosocial and behavioral factors (e.g., psychological distress, social support, inactivity) that both impact and are impacted by pain.
- Can address patients’ primary goals which include performing valued tasks and activities, maintaining important relationships, and preserving a sense of control and independence.
Resources
- Referenced with permission from the NCCN Clinical Practice Guidelines in Oncology (NCCN Guidelinesâ) for Adult Cancer Pain V.2.2024. ã National Comprehensive Cancer Network, Inc. 2024. All rights reserved. Accessed April 3,2024. To view most recent and complete version of the guideline, go online to NCCN.org.