The sleep tremor is also known as nocturnal myoclonus. It’s a common condition that affects about 1 in 5 adults, and it usually disappears once the person has woken up fully or after they have fallen back asleep. However, if shaking persists throughout the day then this could be an indication of Parkinson’s disease or another neurological disorder such as essential tremors which are caused by problems with nerves in certain parts of the body (e.g., hands) that control muscle movements. If you find yourself experiencing any other symptoms associated with these disorders, consult your doctor for diagnosis and treatment options.