If multiple sclerosis is suspected, a special x-ray test of the brain, called a cranial MRI , may be ordered. In some cases, a test called electromyography , or EMG, is ordered. This test looks at how well the nerves work in the affected area and can determine the cause in some cases. In this test, special electrodes are hooked up to the skin and tiny shocks are delivered to the nerve while the response to the shocks is measured. Long-term effects are related to the cause.
Cancer can result in death.
Strokes may cause permanent paralysis and make a person unable to talk in some cases. Continued alcohol abuse can result in liver, brain, and other organ damage. Numbness itself is not contagious and poses no risks to others. Certain infections that can cause numbness, such as HIV, are contagious. Treatment is related to the cause.