Does als cause muscle pain?

ALS: Yes. Muscles cramp and become tight and there appears to be a bag of worms under the skin of the thighs and upper arms (fasciculations). As the nerves that supply the voluntary muscles die off then the muscles become weak. Amyotrophic Lateral Sclerosis generally affects men in the 40-60 age range. The disease is rapidly progressive with no known cure and affects the motor neurons in the body.

Yes: Due to either muscle spasms or spasticity, or even co-morbidities, about 50% of ALS sufferers have pain.