Possible causes of tremor during sleep are multiple sclerosis, stroke, brain injuries and neurodegenerative diseases, states MedicineNet. Tremor is also caused by use of drugs such as amphetamines, and drugs for some psychiatric disorders. Alcohol abuse or withdrawal, steroid use and liver failure are some other causes. Not all tremors are necessarily caused by anything but can be inherited and passed on. Tremors are characterized by involuntary spasms in the arms and legs.
Multiple sclerosis is a nerve disease that affects the brains and spinal cord. Brain injuries are also possible causes of tremors during sleep, because the brain controls our body's movement. Stroke is another possible cause because the condition results in damage to the cerebellum, according to Physicans' Desk Reference. Neurodegenerative diseases such as Alzheimer's and Parkinson's are also possible causes of tremor because a person's nerve cells are gradually dying.
There is no cure for tremor, but it is possible to receive physical therapy and surgical procedures to help combat the condition. In physical therapy, people suffering from tremor work on muscle control and strength in order to regain motion control. The most common form of surgical treatment for tremor is deep brain stimulation, which is a procedure that sends electrical signals to the thalamus, notes the National Institute of Neurological Disorders and Stroke.