Today In - 'Useless Info'

'Spring Fever is a real physical condition which commonly occurs when a sudden warm spell follows a long cold period.

When the temperature rises, the body has to get rid of heat; thus there's a dilation or expansion of the blood vessels so that blood can be carried to the body surface where heat can be lost quickly.

Some people experience an energetic feeling when this change happens due to the body's reaction to the great amount of internal work going on.'