"How bad is your pain on a scale of 0 to 10?" - few questions are asked more often in surgeries and clinics. And few feel as impossible to answer the first time. Is this a 5? Or a 7, because the day was bad anyway?
The good news: the number does not have to be objectively right. It has to match your own earlier numbers. This article shows you what the scale measures, how to build personal anchor points and which mistakes make the record unusable.
What the numeric rating scale measures - and what it does not
The most common form is the numeric rating scale, or NRS. It runs from 0 to 10: 0 means no pain, 10 the worst pain you can imagine. It is one-dimensional, which means it captures the severity only - not the type, not the location, not the duration and not how much the pain restricts your daily life.
That is exactly why the number alone rarely says much. A 6 that lasts twenty minutes is something entirely different from a 6 that has persisted for four days. The scale is one building block of pain documentation, not a substitute for it. What else belongs in there is covered in the guide How to keep a pain diary.
Another important point: the scale is meant to be subjective. It does not compare you with other people, it compares you with yourself. Two people with the same diagnosis can report the same state as a 4 and as an 8 - both are correct, because both reflect their own range of experience.
NRS, VAS, verbal scale, smileys: the differences
In practice you will come across several variants that all try to measure the same thing:
- NRS (numeric rating scale): you name a number between 0 and 10. Quick to explain, immediately analysable, and therefore the most widespread - including over the phone.
- VAS (visual analogue scale): you mark a point on a line without numbers, and the value is measured off afterwards. More finely graded, but impractical for daily self-documentation.
- Verbal rating scale: no pain, mild, moderate, severe, very severe. Helpful when numbers feel wrong or classifying takes too long.
- Smiley or faces scale: originally developed for children and for people who find abstract number assignment difficult.
For a pain diary, the choice is less a question of precision than a question of what you can sustain. A scale that has you deliberating for ten seconds is one you will no longer be filling in after three weeks.
Personal anchor points: what counts as a 4 for you?
The quickest route to comparable values runs through three fixed reference points that you define once and then never change. A proven pattern:
| Value | Anchor point | Example description |
|---|---|---|
| 2 | noticeable but ignorable | "I notice it if I pay attention. Work, conversations and concentration are normal." |
| 5 | constantly present, noticeably disruptive | "I think about it several times an hour. I keep working, but more slowly and with breaks." |
| 8 | defines the day | "I can't plan anything else, I withdraw or lie down." |
Everything else can be placed between these anchors: a 3 is closer to the ignorable end, a 6 is clearly more than "noticeably disruptive" but not yet incapacitating.
It is worth writing these three sentences down once - in a note, in your diary, in the description of your pain definition. Otherwise, by week twelve you will no longer know what your 6 meant in the first month, and that is exactly where many records fall apart.
The range above 8
Values above 8 should stay rare. If you regularly award a 9 you lose headroom at the top and simultaneously compress everything else: if 9 is the norm, the difference between a mediocre and a very bad day becomes invisible. The 10 is meant as an extreme point, not as an expression of despair about a long course of illness.
The three most common rating mistakes
1. Comparing yourself with others. "Other people have it worse, so I'll say 4 instead of 7." That distorts your own record and removes the basis for later comparisons. The scale asks about your experience, not about a ranking.
2. Switching scales. Moving from 0–10 to mild/moderate/severe after four weeks seems harmless, but it makes everything recorded so far unusable. Better to decide deliberately at the start and then stick with it.
3. Rating in hindsight. Summing up a whole day with one number in the evening usually means reporting the worst moment - or the most recent one. Both distort. Better: log close to the event, or deliberately define which moment the number represents (say "the state at 8 pm").
A fourth point, mentioned less often: mood colours the number. On a stressful day the same physical state often comes out one step higher. That is not a fault to be trained away - it is part of how pain is experienced. It is, however, a good reason to record the circumstances separately rather than folding them into the number.
When another scale is the better choice
Not every complaint needs ten gradations. Two alternatives are often more practical:
- Yes/no. For anything that is either there or not: nausea, dizziness, morning stiffness, a migraine day. For the central question "on how many days per month?" this is the right form.
- Mild/moderate/severe. When a rough classification is enough and choosing a number holds you up every time. The record gets coarser, but it stays complete - and a complete coarse record is worth more than a fine one with holes in it.
In PainTrack you set the input type per pain definition: 0–10, yes/no or mild/moderate/severe. All three scales are included in the free version too. So you can use the ten-point scale for "back pain" and yes/no for "migraine day" at the same time - without having to decide globally.
Choose once, then keep it
The real value of the scale only emerges over time. A single 6 says almost nothing. Six weeks with an average of 6 that drops to 4 after a change of treatment says a great deal - provided the yardstick stayed the same throughout.
In practice that means:
- Choose the scale once and write down your three anchor points.
- Rate at the same time of day or in the same situation wherever possible.
- Log pain-free days too - a 0 is information, not an empty field.
- When torn between two numbers, take the lower one - but then apply that rule consistently.
In the trend chart you then see across 7 and 30 days where things are heading; with PainTrack Pro across 90 days and the whole period as well. And it is that curve which is worth more in the consulting room than any single number.
Frequently asked questions
What does a 7 on the pain scale mean? There is no universally valid definition. The range from 7 upwards usually describes pain that clearly restricts everyday life and can hardly be tuned out any more. What matters is that your 7 today means the same as your 7 two months ago.
Is the pain scale objective? No, and that is intentional. Pain cannot be measured from the outside. The scale makes your subjective experience comparable over time - it is not meant to do more than that.
May I use in-between values like 6.5? The NRS normally works with whole numbers, and that is entirely sufficient for tracking a trend. Half steps suggest a precision that pain perception does not have.
Which scale do doctors use? Most often the numeric scale from 0 to 10. If you use the same scale in your diary, you can quote your values directly in conversation without converting anything.
What if I have several complaints at once? Rate them separately. A shared number for back and head pain averages two different courses into one meaningless curve.
PainTrack is not a medical device and does not replace medical diagnosis or treatment. The app is intended for personal documentation and self-observation.