Those in the low-power group were posed for the time period in two restrictive poses: sitting in a chair with arms held close and hands folded, and standing with arms and legs crossed tightly.

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Look for tension in the hands, arms and legs, the shoulders, and finally the face.

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Buerger's disease usually first shows in the hands and feet and may eventually affect larger areas of your arms and legs.

CNN: Buerger's disease

Mr McNicholls spent five months in University Hospital of South Manchester following the crash, undergoing 12 operations to treat the injuries to his face, neck, arms, hands, legs and torso.

BBC: Joel McNicholls

Less common side effects include headache and swelling of a person's hands, feet, legs, face or arms.

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