Click on the link below to find out whether Harry Potter's infamous headaches have been caused by migraine or Lord Voldemort [this muggle is certainly not afraid to refer to you know who!).
http://0-www.ireland.com.ditlib.dit.ie/newspaper/world/2007/0718/1184196660217.html
Source: The Irish Times, 18/7/2007. This article, which appeared originally in The Washington Post, was written by William Weir.