The practice of medicine has been around for thousands of years, and there’s a good reason why they call it a practice: we are still working hard to get it right. Trained medical professionals use the tools at their disposal, along with intuition and sweat, to make their diagnoses. Given the complexities of the human body and mind and all we have yet to understand about them, the healthcare establishment is doing the best they can.
So it’s no surprise that some medical conditions are either misdiagnosed or not diagnosed. Lack of 100% accurate or effective diagnostic tests and methods, patients who don’t fully disclose information to their healthcare providers, and reluctance to seek medical attention because of distrust of the medical system are some of the reasons people are misdiagnosed or are not diagnosed at all.