Doing heavy work hand numbness common diseases are cervical spondylosis and peripheral nerve entrapment, both related to long-term heavy physical labor, mainly the symptoms of frequent exertion of the hand will be more obvious. Cervical spondylosis combined with soreness and tension of the neck muscles, local pain is aggravated when pressing the neck muscles or hand numbness is obvious, it is recommended to visit the neurology or orthopedics department of the hospital to improve the cervical spine MRI and electromyography of the upper limb extension. Rare causes include upper limb vascular stenosis, ischemia of the upper limbs after heavy work or strenuous activities, and in addition to hand numbness, accompanied by decreased skin temperature and white color of the hands, etc. It is necessary to visit the neurology department and improve CTA of the head and neck or ultrasound of the neck vessels. You should go to the hospital for examination and treatment in time to avoid delaying the disease and causing serious consequences.