Tremors can be classified into two categories. Rest tremor occurs mainly when you are at rest. Rest tremor is usually associated with excess mental stress and Parkinson’s disease. Certain medical condition causes body shaking. Sleep disorders is one of the reasons for your body shaking. The second category called action tremor occur when you are performing any task like holding or gripping. Here, the commonly noted causes relate to the presence of certain conditions such as stroke, brain tumour, and multiple sclerosis. Knowing the reasons for your body shaking will be the best thing that you can do to get the necessary medical care at the earliest. Here are some common reasons for your body shaking.