Externally the herbal form has great healing properties for contusions with bruising. It should never be applied to open wounds or broken skin. The roots contain thymol which is a fungicide and preservative and has an anti-inflammatory agent. When used in a gel it can have the same effects as an NSAID for osteoarthritis ....I guess the first symptoms weren't that easy to recognize, loss of hair! Yes, we did notice we were constantly cleaning the kitchen floor because there seemed to be plenty of loose hair around – but having six other dogs at the time you simply assume they are all moulting rather only one of them…