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LANSS pain scale

Helps identify predominantly neuropathic chronic pain through five pain questions and two simple sensory tests.

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Check the population, units and version. The result shows the formula or classification; it does not make an automatic treatment decision.

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Method · Limits of application

LANSS/Bennett 2001: 5 symptoms+2 signs, total 0–24, cutoff ≥12; Brazilian Portuguese Schestatsky 2011

LANSS combines symptoms with signs obtained through sensory examination to investigate a predominantly neuropathic mechanism in chronic pain. Examination items must not be treated as simple self-report. The cited Brazilian validation does not certify the implementation or new translations.

Required fields: 0/7 completed

Complete all required fields. Optional fields are marked.

Does the pain feel like a strange, unpleasant sensation in the skin (pricking, tingling or electric shocks)? required

Does the pain make the skin in the painful area look different from normal (blotchy, red or pink)? required

Does the pain make the skin abnormally sensitive to touch (discomfort with light brushing or tight clothing)? required

Does the pain occur suddenly in attacks without an apparent reason while at rest (electric shocks or stabbing pain)? required

Does the pain make it feel as though the skin temperature has changed (heat or burning)? required

Examination: allodynia (pain or discomfort when brushing cotton over the painful area compared with a normal area) required

Examination: altered pinprick threshold (a prick with a 23G needle feels different in the painful area: more or less intense) required

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Conditions of use

Check the population, units, inclusion and exclusion criteria, and version in the original source. A result alone does not establish a diagnosis, discharge decision or prescription.

Documented parameters

Does the pain feel like a strange, unpleasant sensation in the skin (pricking, tingling or electric shocks)?
Does the pain make the skin in the painful area look different from normal (blotchy, red or pink)?
Does the pain make the skin abnormally sensitive to touch (discomfort with light brushing or tight clothing)?
Does the pain occur suddenly in attacks without an apparent reason while at rest (electric shocks or stabbing pain)?
Does the pain make it feel as though the skin temperature has changed (heat or burning)?
Examination: allodynia (pain or discomfort when brushing cotton over the painful area compared with a normal area)
Examination: altered pinprick threshold (a prick with a 23G needle feels different in the painful area: more or less intense)

4/4 reference cases checked. Numerical tests are not clinical validation.

Sources and documentation

Documented formula

Transcribed from the source or a recorded revision; this is not a clinical recommendation.

Part A (questionnaire): items worth 5, 5, 3, 2 and 1 point. Part B (sensory examination): allodynia 5 points; altered pinprick threshold 3 points. Total 0 to 24; cutoff ≥12.

References

Identifier: escala-lanss

Original clinical content: Brazilian Portuguese.

Method version

LANSS/Bennett 2001: 5 symptoms+2 signs, total 0–24, cutoff ≥12; Brazilian Portuguese Schestatsky 2011

escala-lanss@native-2026-10-05+b3fb6bef5d60

Source for the active edition

The bibliographic edition identifies the source. By itself, it proves neither full conformity of the formula nor clinical approval.

Synthetic cases checked (4)

Synthetic cases for checking the implementation, with no patient data.

Case 1

reference-001

Inputs

Does the pain make the skin abnormally sensitive to touch (discomfort with light brushing or tight clothing)?: Yes
Does the pain make it feel as though the skin temperature has changed (heat or burning)?: Yes
Does the pain feel like a strange, unpleasant sensation in the skin (pricking, tingling or electric shocks)?: No
Does the pain make the skin in the painful area look different from normal (blotchy, red or pink)?: No
Does the pain occur suddenly in attacks without an apparent reason while at rest (electric shocks or stabbing pain)?: No
Examination: allodynia (pain or discomfort when brushing cotton over the painful area compared with a normal area): No
Examination: altered pinprick threshold (a prick with a 23G needle feels different in the painful area: more or less intense): No

{
  "a3": true,
  "a5": true,
  "a1": false,
  "a2": false,
  "a4": false,
  "b6": false,
  "b7": false
}

Expected result

{
  "score": 4,
  "level": "low"
}

Actual result

{
  "score": 4
}

Case 2

reference-002

Inputs

Does the pain feel like a strange, unpleasant sensation in the skin (pricking, tingling or electric shocks)?: Yes
Does the pain make the skin in the painful area look different from normal (blotchy, red or pink)?: Yes
Does the pain occur suddenly in attacks without an apparent reason while at rest (electric shocks or stabbing pain)?: Yes
Does the pain make the skin abnormally sensitive to touch (discomfort with light brushing or tight clothing)?: No
Does the pain make it feel as though the skin temperature has changed (heat or burning)?: No
Examination: allodynia (pain or discomfort when brushing cotton over the painful area compared with a normal area): No
Examination: altered pinprick threshold (a prick with a 23G needle feels different in the painful area: more or less intense): No

{
  "a1": true,
  "a2": true,
  "a4": true,
  "a3": false,
  "a5": false,
  "b6": false,
  "b7": false
}

Expected result

{
  "score": 12,
  "level": "high"
}

Actual result

{
  "score": 12
}

Case 3

reference-003

Inputs

Does the pain feel like a strange, unpleasant sensation in the skin (pricking, tingling or electric shocks)?: Yes
Does the pain make the skin abnormally sensitive to touch (discomfort with light brushing or tight clothing)?: Yes
Examination: allodynia (pain or discomfort when brushing cotton over the painful area compared with a normal area): Yes
Does the pain make the skin in the painful area look different from normal (blotchy, red or pink)?: No
Does the pain occur suddenly in attacks without an apparent reason while at rest (electric shocks or stabbing pain)?: No
Does the pain make it feel as though the skin temperature has changed (heat or burning)?: No
Examination: altered pinprick threshold (a prick with a 23G needle feels different in the painful area: more or less intense): No

{
  "a1": true,
  "a3": true,
  "b6": true,
  "a2": false,
  "a4": false,
  "a5": false,
  "b7": false
}

Expected result

{
  "score": 13,
  "level": "high"
}

Actual result

{
  "score": 13
}

Case 4

reference-004

Inputs

Does the pain feel like a strange, unpleasant sensation in the skin (pricking, tingling or electric shocks)?: Yes
Does the pain make the skin in the painful area look different from normal (blotchy, red or pink)?: Yes
Does the pain make the skin abnormally sensitive to touch (discomfort with light brushing or tight clothing)?: Yes
Does the pain occur suddenly in attacks without an apparent reason while at rest (electric shocks or stabbing pain)?: Yes
Does the pain make it feel as though the skin temperature has changed (heat or burning)?: Yes
Examination: allodynia (pain or discomfort when brushing cotton over the painful area compared with a normal area): Yes
Examination: altered pinprick threshold (a prick with a 23G needle feels different in the painful area: more or less intense): Yes

{
  "a1": true,
  "a2": true,
  "a3": true,
  "a4": true,
  "a5": true,
  "b6": true,
  "b7": true
}

Expected result

{
  "score": 24,
  "level": "high"
}

Actual result

{
  "score": 24
}

Code and reproducibility

This tool’s code on GitHub

Download code and tests

Sources, version and reproduction instructions

README

Local installation

Code license: Apache-2.0

Guidelines and conditions

This repository’s license applies to the code. Third-party instruments, questionnaires, data and models remain subject to their owners’ conditions.

The code tests are technical checks. Clinical approval and professional translation review are recorded separately.

Relationship with cancer research

General context — relationship to be defined

A resource for general clinical contexts. This edition does not assign a specific oncological relationship; selecting it for a study requires a justified question, population and purpose.