Giroud has struggled since his arrival from Montpellier in the summer.
"With forwards it is more a matter of cycle," he said. "Forwards sometimes go through a rough period, but maybe he just needs a goal to get out of this drought.
"Also for forwards it is a little bit different in England. The game is different for two positions, especially for forwards and goalkeepers. It is a real shock for them because there is a lot more contact."