Kennedy’s disease is an x-linked recessive genetic disorder that can be easily confused with motor neuron disease, with the main symptoms being motor neuron damage. The early symptoms are mainly muscle spasms with pain and generalized fatigue, and the characteristic expression is breast development in men. The progression of the disease is slow, and the weakness of the limbs is mainly proximal, often accompanied by muscle atrophy, which gradually spreads to the distal limbs as the disease progresses, with the lower limbs having more severe symptoms than the upper limbs. Sometimes the medulla oblongata can also be involved, resulting in atrophy of the tongue muscles, difficulty swallowing, and significant dysarthria during speech. The facial muscles can also be involved, showing weakness of the facial muscles and masticatory muscles, but the sensation is normal.