Numbness of the tongue at night needs to be observed for any accompanying symptoms.
If it is accompanied by confusion, numbness or hemiparesis of one limb, or voice disorder, ischemic cerebrovascular disease is considered.
If it is accompanied by neck pain and impaired movement, cervical spondylosis is considered.
If there are no accompanying symptoms and the numbness of the tongue is light in the morning and heavy in the evening and gradually worsens, consider burning mouth syndrome.
It is necessary to consult a doctor for further examination to confirm the diagnosis.