It can also cause the head to uncontrollably tilt backward and forwards. Torticollis is a disorder which is rare and can develop at any age, even at infancy but it most often develops in women who are middle-aged. The symptoms begin gradually and reach a point where they do not get any worse. Torticollis has no cure but the disorder often resolves on its own.
For the period of the Vietnam War the totals are 1,310,000 between 1955 and 1964, 1,700,000 between 1965 and 1974 and 81,000 in 1975. (The estimates for 1955 to 1964 are much higher than other estimates). The sum of those totals is 3,091,000 war deaths between 1955 and 1975.
Also, all of the numbers above EXCLUDE any deaths in Laos and Cambodia. A ballpark number for the entire regional death toll is 5+ million. See the link below for a summary of military KIA for the war. Over 58,000 US Servicemen died in the war; for casualties of other nations, see: Vietnam War casualties.