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You are correct: ALS is not at all a sensory disorder. In fact, ALS is classified under a group of disorders known as "motor neuron disease." It specifically affects motor "neurons" (nerve cells) in the spinal cord. Sensation is completely spared with ALS. You would not feel the atrophy of ALS occurring. While EMG's can be normal early in ALS, by 8 months there should be significant evidence on EMG of ALS.
Pain in and of itself could be a number of things, depending on the type of pain (from arthritis to fibromyalgia to neuropathy [including small fiber neuropathy, which often does not show up on EMG/nerve conduction study], etc., etc.). But based on your comments above, if you have no obvious muscle atrophy, weakness, or fasciculations (twitching of muscle fibers), you can certainly rest assured that you do not have ALS.
I hope this helps.
Unfortunately, there is pain that cannot be explained to date by medicine. But I do hope you rest assured that ALS is not the cause. (As you may have read in my other post about ALS, there are multiple causes of fasciculations.)
This could be a case of fibromyalgia. Compression neuropathies can cause temporary symptoms of paresthesias as well. (The classic example is when your foot "goes to sleep.") These can happen with sitting in certain positions or resting a given body part on a surface such that a nerve is compressed. These typically are fleeting and would not be expected to show up on EMG/nerve conduction study. Without being able to examine you and actually see/do the tests, I'm not able to make a diagnosis.
We do see a lot of scared patients. We definitely prefer telling patients "It's not ALS" to "It's ALS." Best of luck to you.