The information provided here is not a replacement for a doctor. You shouldn't use it for the purpose of self-diagnosing or self-medicating but rather so you can have a more informed discussion with a professional TCM practitioner.
Because it is a herb specifically indicated to treat anemopyretic cold as can be seen on Tamarisk Twig And Leaf's page.
Tamarisk Twigs And Leaves is a Neutral herb that tastes Pungent and Sweet. It targets the Stomach, the Heart and the Lung.
Its main actions are: Induces sweating. Clears Wind from the Exterior. Outthrust rashes. Detoxify.