Since joining on loan from Juventus in the summer, the Argentine has managed just three goals.
Higuain has played in Spain and Italy, but admits England has posed a different sort of challenge.
He said: "You watch the games on TV and you see that it's a fast and powerful league to play in, but when you're playing it's even more so. You come up against defenders that are really strong.
"Also, we've seen any team can beat any other team. We're one point off the Champions League spot so we have an opportunity to put pressure on the other teams for the end of the season."