Numbness of the left arm in the morning may be caused by physiological factors such as prolonged compression, or it may be caused by pathological factors such as cervical spondylosis and peripheral nerve compression syndrome.
1. Physiological factors: If the left arm is compressed at night when sleeping, the blood circulation is not smooth, the symptom of numbness of the left arm in the morning may appear, and the numbness will be gradually recovered after resting.
2. Pathological factors
(1) Cervical spondylosis: if the cervical disc degenerative changes, resulting in disc herniation, ligament calcification, osteophytes, irritation or compression of neuropathy, blood vessels, spinal cord, can be induced by numbness of the hand cramps in the morning when getting up to change the position may be more obvious.
(2) Peripheral nerve entrapment syndrome: If the sleeping posture is poor for a long time, the nerve of the left arm is compressed, which can cause numbness of the left arm after getting up in the morning.
The left arm numbness after getting up in the morning, after excluding the physiological factors, should be timely consultation, improve the relevant examination, to clarify the cause of the disease, if necessary, to carry out the corresponding treatment.