Hello,not ALL of our symptoms are caused by stress and anxiety. They play a great role in startup and accompany us for the rest of disease, but partly we really have our nerves (peripherical ones) and probably muscle membranes affected - however not so severe and deadly as in MND. Actually for the lower motor neurons there is no matter what causes their bad conditions - trauma, chronic inflammation with loss of myelin like in MS or rapid and irreversible degradation of the gray matter without obvious inflammatory signs like in ALS (where same aslo is caused for motor parts of the brain). If they suffer, we experiense tremors, pains, strange sensations etc. Well, badly treated ulnar syndrom results in the same loss of grip and atrophy and palsy as ALS for example (the only difference is that palsy is limited by hand and does not kill).Among the factors affecting our conditions we also have hormonal level (those are slightly and regularly changed even in men, not talking about ladies who really live for best part of their lives within huge hormonal clocks), any stress we regard as nothing our hyperexitable nervous system might consider as enough to react with somatic signals etc. Even the food could cause something.as for the eyelid drop, you really might point the doctros on this and ask if it is really prominent enough to be a neurological sign. I know that it is a common symptom, for example, in people after stroke or other ishemic brain conditions (someteils one might have a kind of transient 'stroke' or a micro one). Unilateral sensations as you describe might also point to ishemic conditions, and this is anyway worth to check.good sign anyway is that your conditions are not constant and you have good days as well as bad ones. Do remember that if something had gone once, it could go away again. And please remeber also that we all (not only BFSers) are really prone to listen to our body if something was wrong once... and that we can unintentially overestimate signs and feeleings and this is very common. That's why maybe your doctors could not find anything specific - because they are outside of your body and your nervous system.