You're exhausted. You're gaining weight. You can't think clearly. Something feels different in your body, but every time you have blood work done, you're told everything looks normal. Sound familiar? For many people, this is one of the most frustrating experiences in healthcare. You know how you feel, but the answers aren't showing up on your lab report.

Getting sick occasionally is a normal part of life. Exposure to viruses, children in school or daycare, travel, seasonal illnesses, and working around the public can all increase how frequently you're exposed to infections. But if you find yourself asking “Why do I keep getting sick?”, there may be more worth investigating.