yes there are but i guess it's not available in most hospitals ,, and it's very expensive i guess ,, i saw once on discovery while they were doing research.

With MRI pain can be measured.

http://www.technologyreview.com/news/425417/an-objective-way-to-measure-pain/

http://blogs.discovermagazine.com/80beats/2011/09/22/brain-scans-suggest-a-new-objective-way-to-measure-pain#.USh1UGdfKd8

http://www.popsci.com/science/article/2010-03/brain-scan-measures-pain-promises-quantify-formerly-subjective-feeling

http://www.eurekalert.org/pub_releases/2010-05/uobc-mpc050710.php

Regards,

Joachim

For completeness: The nociceptive flexion reflex is used as an experimental measure of pain intensity:

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1993909/

The fMRI and facial expression measures mentioned by Joachim and the nociceptive flexion reflex are interesting tools for experimental settings, but are not validated measures of clinical pain or pain in general. There is no "objective", unbiased measure of pain — yet. This is one of the most important unsolved problems in pain research.

Cheers,

Matthias

Thanx Matthais !

There are methods to measure pain objectively. But, are yet to be validated in clinical trials.

Http://link.springer.com/chapter/10.1007/978-3-540-92841-6_166#page-1

pain is a subjective feeling. it varies from one person to the other. There are self report tools that can be used to assesse the intensity of pain.The tools are different for acute and chronic pain

Pain is subjective feeling. it varies from individual to individual as per their Prakriti- Psychosomatic constitution . Exactly measurement is not possible till date but can be assessed on different pain scales e.g. Visual Analog scale, korfnsky scale.