What is a common complication of challenge testing?

In the context of challenge testing, headache is often observed as a common complication. This form of testing typically involves the administration of a substance or stimulus to evaluate the reactivity of the airways, such as methacholine or exercise. During or after the challenge, individuals may experience various physiological responses as their bodies react to the stimulus.

Headaches can occur due to several factors during this process. For instance, the increased respiratory effort, changes in blood circulation, or even anxiety related to the test may contribute to the onset of headaches.

While shortness of breath, nausea, and dizziness can also occur during challenge testing, headaches are frequently reported and are recognized as a possible outcome of the testing procedure. Understanding this complication is essential for proper patient counseling and preparation before performing such tests.