Hi, Welcome to health care magic, I have read your husband s problem and understand the concern. Belching is way of body to expel out air from stomach whether it is due to excess swallowed air or produced because of food digestion or acid reflux or gastritis etc. In your husband s case,he could have dehydration for which he became disoriented and blackout for few moments. give him plenty of fluids with fruit juices to maintan water and electrolyte balance. Should eat high protein and easily digestive food rather than carbohydrates or fatty foods. Drink much of water will help to reduce belching. Consult gastroenterologist if there is any underlying stomach problems like hiatus hernia,reflux esophagitis, gastritis, gastric ulcer. Regards,