A number of cases of hypoglycemia are reviewed. The symptoms discussed are the faintness, headache, palpitation, visual disturbances, unconsciousness, and sinking feeling before meal, etc. Assaults and cruelty have also been associated with hypoglycemic patients Generally these symptoms occur when the blood sugar falls below 50 mgm per 100 ml., but the level at which symptoms arise varies from patient to patient and time to time.