Warning indicators of low blood sugar (hypoglycemia) are: Sweating: Excessive sweating, particularly if it occurs unexpectedly and unrelated to physical exertion. Shakiness: Trembling or shakiness, particularly in the hands. impatience: Unexpected mood swings, impatience, or disorientation. Hunger: Severe hunger, even after eating lately. Weakness: Generalized weakness or exhaustion. Dizziness refers to feeling lightheaded or dizzy. Headache: Blurred eyesight. Paleness: The skin is pale. Tingling feelings occur in the mouth or other regions of the body. Concentration Issues: Difficulty concentrating or confusion.