Muscle atrophy of the tiger pits is mainly seen in motor neuron disease, cervical spine disease, muscle disease and other causes, as follows: First, motor neuron disease: the patient should be asked whether the muscle atrophy of the tiger pits is unilateral or bilateral, whether it is accompanied by weakness of the hand muscles, and whether the onset is acute or chronic. You need to consider the possibility of motor neuron disease, you need to go to the head magnetic resonance and lumbar puncture examination, and electromyography examination. Second, cervical spine disease: tiger point muscle atrophy, ask the patient whether there is a history of cervical spine disease, upper arm muscle atrophy is single-handed or double-handed, also need to carry out cervical spine magnetic resonance examination to understand whether there is a cervical disc protrusion, or some occupational lesions of the cervical spine. Third, muscle disease: tiger muscle atrophy, ask the patient whether it is unilateral or bilateral, whether there is muscle pain, loss of strength, whether there is fever, etc., also consider whether there is muscle disease, need to conduct electromyography and muscle enzyme examination to clarify.