I hope that you may be able to give me some advice. My son recently moved in with me but I am concerned about his health. He is 6’3 but weighs only 123 lbs. He told me that he wakes up sometimes with stomach pain and a voracious appetite but never seems to gain any weight. He has always been slim but now looks alarmingly thin. He’s down 3lbs since two days ago. He doesn’t have any insurance so it will be self-pay by me on his behalf. I welcome any suggestions you may have and appreciate your help. Have a most wonderful day!