Hair follicle testing requires washing your hair.
Hair follicle testing, also commonly called hair loss follicle testing, is a way of testing patients for specific causes of hair loss. It is mainly a dermoscopic test to observe whether the density and organization of the hair follicles are normal or not. The hair needs to be washed before the test is done to keep it clean, and not washing it will affect the results to some extent.
Before the hair follicle test, you need to wash your hair with shampoo and rinse it off with running water to avoid residual shampoo affecting the health of your hair.
Before doing the hair follicle test, it is recommended to consult a professional doctor and make sufficient preparation before the test to ensure the accuracy of the test results.