extreme
sugar cravings (It is lengthy , but might be helpful to you and your son)
"hypoglycemia is low blood sugar, and it is increasingly prevalent in our society. Hypoglycemia can cause an array of symptoms, including spaciness, fatigue, mood changes, PMS, sugar craving, headaches, difficulty focusing the eyes, tremors, temperamental outbursts, depression, excessive sweating, hot flashes, palpitations, cold extremities, abdominal pain, and panic attacks.