ScienceAllergies: Finding the causeTo view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoScience07/07/2016July 7, 2016Dr. Ralf Hartmann explains the methods used to find the cause of an allergy. What can you find out from a skin prick test? And is it painful?https://p.dw.com/p/1JKtPAdvertisement