The Dutchman has only registered one Premier League goal since completing a reported £8.5 million deal from Sporting in the summer, with that strike coming on the opening day of the campaign against Everton.
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"Possibly he can try to do too much in other areas of the field and maybe he has to be more selfish in the box," said Hughton.
"But what you have to remember with Ricky is that right now if he had not had his injury problems, he would be in full flow.
"Of course, it is a concern about the strikers. We want to be winning football matches but I know Ricky and Gary (Hooper) are working so hard.
"The money we paid will always mean there is pressure on him. We just have to get the formulas right."
Van Wolfswinkel's struggles have played a part in Norwich netting just 18 goals in 22 Premier League games this season, the third worse in the division.