Mike said: "My point is that I want to make sure we agree on what to tell DIHALS, because I don't want to give out bad information."
Agreed and there are more than enough DIHALS already.
Mike said: "My understanding is that pain is not a beginning symptom that a doctor would use to describe ALS. Pain happens after a patient has been paralyzed awhile."
That is my understanding and my experience also except that pain can appear before a patient is paralyzed, but in those cases it is what I would call "secondary" to some other feature of ALS, like a cramp. Tillie describes the cramp process in ALS very well, but we all know you can have cramps and pain from those cramps without having ALS. The pain is caused by the cramp, not by the ALS. You can also have pain from falling on your face. But the pain in that case is caused by the face-to-pavement impact, not by the foot drop that was caused by ALS. There, obviously, is a linkage, but it is a secondary or tertiary relationship.
ALS symptoms are those directly caused by ALS, like denervation, hyperreflexia, etc.
I believe what we have been telling DIHALS is correct. Pain is not a useful diagnostic symptom, but to say there is no pain in ALS is not 100% correct. Pain from secondary and tertiary causes can happen and, in fact, can happen more to us than to non-PALS. My bilateral foot drop does not cause me any pain... until I get careless and trip and fall.