Numbness on one side of the tongue can be caused by nerve inflammation, cervical spondylosis or hyperlipidemia, stroke, etc. can cause similar symptoms. Inflammation of the nerves can lead to sensory-motor abnormalities or autonomic disorders within the innervated area of the nerves, which can lead to localized numbness. After suffering from cervical spondylosis, because the protruding vertebral artery will compress the nerve root, which will lead to the function of the nerve endings of this nerve compression will also be reduced, which will lead to numbness on one side of the tongue, and also cause limb disorders. Hyperlipidemia will lead to increased blood viscosity, which will lead to changes in the microcirculation of blood vessels, and even cause local blood supply or insufficient blood supply to the brain, which will cause dizziness and also lead to numbness in a part of the body, and this phenomenon will also occur in hemiplegia of stroke.