The first thing that should be considered is a problem with the nerve of the patient. If the nerve is diseased or completely broken, it can lead to the lack of sensation in the hand. Secondly, the loss of sensation may also be due to spasm of the blood vessels in the hand, resulting in obstruction of the blood at the end. Again, if there is damage or lesion in the somatosensory part of the brain, it can also cause loss of sensation in the limbs. Finally, it is not excluded that the patient has symptoms of muscle atrophy, and it is recommended that the patient go to the hospital for examination and early treatment to find the cause of the disease. Patients should also pay attention to the protection of their hands in daily life, and acupuncture or physical therapy can promote nerve repair. If necessary, oral neurotrophic factors can be taken, and in severe cases patients can take surgical repair methods to help with treatment.