You need to recall if you are on any medications that could be causing these potential side effects.
Injury at the back,
neck, spine, you have severe back pain you said. Twitches are common and can be due to a variety of causes like medications, cold, exercise, fatigue, an overactive thyroid, and spinal cord viral infections. You need to have other neurological disability to qualify for ALS or MS. acute and widespread twitches are usually benign.