Leeches to treat whiplash injury (i.e. injury to the neck) in a footballer. Whiplash is a neck injury due to a forceful, rapid back-and-forth movement of the neck, like the cracking of a whip. Symptoms include neck pain and stiffness, neck swelling and tenderness, and reduced movement in the neck. There may also be headache, lower back pain, pain, numbness or pins and needles in the arms and hands, muscle spasms, dizziness, tiredness, difficulty swallowing, blurred vision, vertigo (i.e. a sensation of moving or spinning), and tinnitus (i.e. ringing in the ears).