was ist im blut — when to see a doctor?

When to see a doctor based on blood results depends on context. A single abnormal value does not automatically indicate disease – many factors (diet, time of day, stress) affect results. If you have symptoms like fatigue, unexplained weight loss, fever, or pain, medical evaluation is always advisable. Also, if values are far outside the reference range (e.g., severely elevated liver enzymes, HbA1c > 6.5 %, or abnormal blood count), you should consult a doctor promptly. For consumer tests (e.g., MyBody-X), clinical validation is often lacking – results should be seen as screening, not diagnosis. Evidence for the benefit of such home tests is weak to moderate; they do not replace a medical examination. Caveat: Without medical interpretation, an abnormal result can cause unnecessary worry or false reassurance. When in doubt or if values are repeatedly abnormal, seeing a general practitioner or specialist (e.g., internist) is the safest course.