Patients with diabetes can feel fatigue, sleepy, which can also be seen in patients with cranial problems. Drinking all of the time is a common symptom in patients with diabetes; sweating all the time can also be seen in patients with diabetes due to uncontrolled blood sugar levels. Sometimes, two severe conditions in diabetes can occur, in name of Hyperglycemia hyperosmotic condition and Diabetic ketoacidosis. These two conditions can also present symptoms of drowsiness, thirsty and sweat.