Right arm sleepy, the following reasons: First, right upper arm or forearm trauma: trauma leads to muscle injury, muscle edema and congestion, there will be localized sleepy clinical symptoms, there will be obvious pain and activity restriction when pressed. Second, upper limb muscle strain: severe muscle strain of the right upper limb will lead to right arm sleepiness, which is mainly seen in heavy physical labor or long time maintaining a fixed posture, the patient will have upper limb soreness, pain, weakness and other symptoms. Third, cervical disc herniation: severe cervical disc herniation will stimulate the nerves, causing continuous radiating pain and tension in the muscles of the right upper limb, which will also lead to the symptoms of right arm drowsiness. The patient will also suffer from neck pain and limited cervical spine movement. Difficulty in the right arm can be rapidly relieved through early diagnosis and treatment. Care should be taken to protect the cervical spine and avoid trauma and strain to the right upper limb.