likeliness of having ALS

hello and welcome

your concern is appreciated

there are many reasons minor and major for causing muscle twitching called fasciculation. excersize, too much caffeine or nicotine , lack of nutrients in the diet, stress and anxiety in which its called nervous tics, drug side effects. major causes include ALS, neuropathy or damage to the nerves, spinal muscular atrophy , muscular dystrophies etc. test like serum electrolytes, thyroid funcyion test,blood chemistry, CT scan and MRI scan of the spine and brain, nerve conduction studies, are all helpful to diagnose the culprit condition

hope it helps
thanks