<s>[INST] My son is 14 and is tired and withdrawn. We have tried gluten free diet that seemed to help with constipation. He has been having dizzy spells more often lately. His blood work last year indicated he was missing Igg. Any thoughts I could do to make him feel better or how to talk to the doctor? [/INST] With such presentations in my clinic, I would suggest Egg replacement therapy, it is the treatment of choice for most primary immunodeficiency syn Chat Doctor.  For dizziness, you can use Betahistine 1 tablet twice a day for 1 week. For tiredness, you can give multivitamins-Zincovit or Revival for man 1 tablet once a day for 1 month. For constipation try to follow the following guidelines. - High fiber diet, green leafy vegetables-beet, zucchini, fruit, fresh juices.- Cut down the processed food. White bread, doughnuts, noodles, pizza, rice should be completely avoided.-A 40-minute physical activity every day like morning walk, evening walk or a visit to the gym or swimming pool.-Dual 1 tablespoon once a day for 1 month. Start on these changes and get back to me in 2 to 3 months. Wish you good health. </s>