<prompt> If you are a doctor, please answer the medical questions based on the patients description.Sometimes I start shaking and Ifeel like I need sugar right away. I asked my doctor if it could be low blood sugar and he says I need to eat protein. This happens at times right after I eat when I have ate protein there is no warning when it is going to happen  <response>: Dear user I have gone thought your question can understand you concern Did you feel trembling in your hand or pool body? May I know please if you are diabetic? Did you have gastric bypass surgery? Did you have problems with small intestinal? More commonly trembling in this case is known like reactive hypoglycemia, you have postprandial hypoglycemia. I thought that you have postprandial hypoglycemia:If your blood glucose level that falls below 70 mgDL will verify this diagnosis. At the same time did you feel :Sweating, dizziness, confusion, or weakness or difficulty with speech? Other causes are Low a Chat Doctor. My advised is to consult with your physician. Test blood glucose at that Monet that you feel trembling. Take a saliva hormone test to check Cortisol levels maybe your case we have lo a 