Left suprascapular nerve injury is usually caused by simple scapular fracture or dislocation of joint injury. If it is accompanied by stiff neck, dizziness, headache and other symptoms, it may be cervical spondylosis. Left suprascapular nerve injury is usually caused by left scapular fracture or dislocation of joint injury. Clinically, it may manifest as symptoms of limited functional shoulder activities such as weakness of abduction of the left shoulder joint, limitation of rotational movements, and weakening of the power of external rotation, which are often accompanied by pain and numbness in the back of the left shoulder. Cervical spondylosis often manifests as head and neck pain, stiffness and discomfort, and some patients with cervical spondylosis may experience symptoms such as dizziness and headache, as well as radiating pain in the back of the shoulder and arm. To clarify whether the left suprascapular nerve injury is caused by cervical spondylosis, it is necessary to go to the hospital in a timely manner for further relevant examinations, such as CT, MRI, etc., so as to make a clear diagnosis. If patients have left suprascapular nerve injury, they should cooperate with doctors to conduct further examination, identify the cause and treatment, so as not to delay the condition.