Guess the way to handle it should varies among people? GENERALLY
most of them would avoid cold drinks... Some recommend light
aerobic exercises like jogging which would make you perspire...
Some also take chicken essence during that period to act as
replenishment....
You should trial and error on the methods to minmise discomfort and
can even ask around your female colleagues for discussions and
advices...? If you can't really minimise the discomfort using the
various methods, you can try balancing your hormones by the
'external methods'.... eg. Like exercising, sex, being happy, doing
things ya enjoy doing etc....