Is Lou Gehrig's disease a mental illness?
Generally speaking, Lou Gehrig's disease (ALS) is not a mental illness; the two conditions differ completely in disease type and pathogenesis. Professional evaluation is required when confusion arises. If there are concerns, it is recommended to seek medical consultation early. The detailed analysis is as follows:

Lou Gehrig's disease, also known as amyotrophic lateral sclerosis (ALS), is a neurodegenerative disorder that primarily affects motor neurons, leading to progressive muscle weakness, atrophy, and impairment of limb movement, swallowing, and respiratory function. It does not involve cognitive, emotional, or behavioral abnormalities typically associated with psychiatric conditions. The core issue lies in the progressive loss of motor function.
Mental illnesses are disorders primarily characterized by disturbances in mental activity, including schizophrenia, bipolar disorder, and others. These conditions arise from abnormalities in brain functions related to cognition, emotion, and thought, manifesting as hallucinations, delusions, emotional instability, social withdrawal, and similar symptoms. They are entirely distinct from ALS in both neurological damage mechanisms and clinical manifestations, belonging to separate disease categories.
If symptoms such as muscle weakness or atrophy resembling ALS appear, especially when accompanied by psychiatric symptoms, prompt medical evaluation at a qualified hospital is essential. Accurate diagnosis through professional examinations can prevent treatment delays due to misidentification of the disease type. Follow-up care and interventions should be conducted under the guidance of healthcare professionals.