Brief Answer: Most common issues are sinus and tonsil issues Detailed Answer: Hello XXXXX, Thanks for coming to HealthCareMagic. Reccurent sore throats and recurrent upper airway infections in adults are generally due to allergies, sinus issues or tonsil issues. Have you ever had your tonsils removed? Or any surgery on your sinuses? Also, Could you please tell me how often you have been getting sick and what the circumstances are like. It would also be very helpful if you could tell me about any other medical issues you might have. The more information you can give me, the more useful our discussion will be for you. I hope this helps. Looking forward to your reply. Vinay

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