How is pain evaluated?
That’s because everyone experiences pain differently.
Unfortunately, there’s no definitive lab test or x-ray-like machine that can measure pain. Instead, health care providers rely on the person in pain to describe how it feels. But describing pain is difficult. Everything people say about pain is subjective. They might say the pain is severe, but “severe” means something different to everyone.
To try to make pain assessment easier and more accurate, clinicians created pain scales. Pain scales can be a valuable tool, but when used by themselves, pain scales don’t always work as intended.
ADVANTAGES OF PAIN SCALES
Pain scales are communication tools used to assess the amount of pain a person is experiencing. If you’ve had an injury or surgery, you’ve likely been asked something like, “On a scale of zero to 10 — with zero being no pain and 10 being that guy who got eaten in ‘Jurassic Park’ — how would you rate your pain?” That’s a pain scale.
There are several kinds of pain scale assessments. They vary by focus (e.g., pain intensity, pain-related experiences, pain duration) and format (e.g., single question, multi-page questionnaire, graphics or charts). Clinicians use different scales based on the situation, the individual and type of pain.
In many cases, pain scales help clinicians understand a specific person’s pain journey and create a treatment plan. In general, most:
- Are quick and easy to use. Scales like those that use number scores or facial expressions can quickly provide information on symptom severity.
- Help track pain over time. When a pain scale is used consistently over time, it can help determine whether a person’s pain is getting better or worse.
- Inform treatment plans. A pain scale can also help providers gauge whether a therapy is working for a specific individual. For example, if a person uses a symptom scoring tool three days in a row and switches medication on the second day, a lower pain score on the third day might suggest the new medication is working better than the previous one.
PROBLEMS WITH PAIN SCALES
Although pain scales are useful tools, they need to be paired with more objective information to create effective treatment plans. Most issues with pain scales happen when they are used as the only or primary source of information about a person’s pain.
Pain scales give providers valuable — but subjective — information. For example, some people can rank their pain at an 8 out of 10 and still go to work, while others can’t get out of bed with a score of 3. One study showed that even asking a follow-up question such as “Is your pain tolerable?” adds critical information for the provider and helps align someone’s expectations with realistic treatment goals.
In addition, many pain scales focus on a person’s pain level at the moment of the test and fail to address how pain affects people’s daily life. For example, pain scales often don’t accurately assess:
- Pain tolerance. Every individual’s tolerance to pain is unique. It’s shaped by biological and psychological factors — including genetics.
- Pain history. An account of previous or ongoing pain can inform how a person copes with pain and what treatments have worked in the past.
- Emotional state. Emotions can influence a person’s pain scale ratings. In addition to pain, people often feel anxiety, anger, grief, stress and helplessness.
- Pain changes with activity. Pain may get better during certain activities and get worse with others. For example, a person with chronic back pain could feel worse after sitting at a desk all day and better after a yoga class.
- Pain fluctuations over time. Many pain assessments only reflect how much pain the person is feeling at the time of the test. It can increase or decrease with the time of day. Recent studies suggest it’s more valuable to ask individuals to rate their average pain over a week or more.
Other problems can occur when providers place too much emphasis on a pain scale and focus on reducing short-term pain intensity instead of long-term pain management. As a result, their efforts to keep pain scores low with medication can be a barrier to getting people back to their regular routines. Many experts believe that providing education about active pain treatments, such as relaxation techniques and mindfulness practices, can help people manage pain more effectively over time.
HOW WE USE PAIN SCALES TODAY
Today’s providers are transitioning away from using only pain scores and descriptors to monitor pain and treatment success. Instead, they strive to assess the person, not just the number. They ask people who are experiencing pain about what’s important to them. Is it being able to go to work? Being present for your kids? Playing basketball again? Answering questions about their goals is more powerful than a number or survey result. This profound change in thinking puts the person — not the pain — at the center of the discussion.
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