I am not familiar with Guamanian ALS.
Pain in the fingers and toes can be caused by a number of neurologic conditions. Peripheral neuropathy, B12 deficiency, thyroid problems, and a pinched nerve can all be considered. Obtaining an EMG as well as a spinal MRI to evaluate for central nervous lesions can be considered.
An elevated ESR is non-specific, and can be caused by infection or rheumatological diseases. An ANA level can be done to rule this out.
If ALS is suspected, nerve conduction studies, an EMG, as well as an MRI can all be considered.
I would discuss these questions with a neurologist.
Followup with your personal physician is essential.
This answer is not intended as and does not substitute for medical advice - the information presented is for patient education only. Please see your personal physician for further evaluation of your individual case.
Kevin, M.D.
kevinmd_