There are particularly lucky cases. In one of them, a woman was sitting in front of Jan-Peter Jansen, pain medicine specialist in Berlin, and said that it was only three days with her. Three days of migraine headache a month. And no longer thirty. Up until then, the woman had suffered a migraine attack or had other headaches on almost every day of her life, making her one of the most troubled headache patients in the large pain center that Jansen runs. And among the doctors' most complicated cases, no therapy had worked for her. Until she got the injection.