Is ALS painful?

Usually not. Pain is not usually a prominent presenting symptom in ALS, but can occur due to spasticity, muscle spasms, and even co-morbities. About 50% of cases experience some pain. One caveat, pelvic pain may herald infection, especially urinary, and chest pain, possibly pneumonia.
No. Als is a progressive neuromuscular disorder. Only the motor neurons and muscles are affected. The sensory nerves remain intact, so the patient can feel pain, but the disease itself does not cause pain.
ALS . Not usually as it is a disease of the Alpha motor neurons that controls muscles. Does not involve sensory nerves that transmit pain and temperature messages.