Dear , This is Dr. S. Tomar from healthcaremagic.com s medical team and I ll be your medical adviser for this question. First of all thank you for sharing your concern with us and showing trust on us. I would like to inform you that sinus infections and UTIs are quite common infections in general population . Recurrent infections shows that your immune system is not able to eradicate the infection efficiently which is indicative of decreased immunity . Common conditions which make the immune system weak are : stress , sleep deprivation , nutrition deficiency , diabetes , thyroid disorders . There should be evaluation on these mentioned conditions . Take a proper consultation with your GP for present infections . I would suggest you to follow these for a better immune system: 1. exercise regularly: this is the most important step in improving immunity . Make it a part of life. 2. eat a healthy diet and exclude allergic food items. Include garlic , yoghurt , probiotics , green tea , sweet potatoes, white meat , tuna in diet . 3. sleep 7 hour daily 4. practice yoga/deep breathing exercises . 5. take your prescribed medicines on right time, if any. 6. include a multivitamin daily. 7. maintain a good hygiene 8.say no to smoking. 9. if you drink the ndrink in moderation. 10.get your periodic medical check ups done according to your age and risk factors. This is my initial response and discussion is open until you have any query or need further clarification. I wish you good health . sincerely, Dr. Shardendu Tomar