The Potters failed to find the net for a third Barclays Premier League game in succession as they played out a goalless draw with West Brom at the Britannia Stadium on Saturday.
They have struck just four times all season and, although they at least arrested a run of three successive defeats, they have not won in the top-flight since August.
Hughes said: "In every game we have played we have created chances, but haven't converted them.
"The longer that goes on the more confidence we will lose. It is important we start scoring and start converting what we are creating."
Stoke had few clear-cut chances in a largely uninspiring clash against the Baggies.
Stephen Ireland spurned the best of them when he blazed a first-time shot over the bar on a quick counter-attack.
But the hosts also rode their luck and were reprieved when Adam appeared to trip Youssouf Mulumbu in the penalty area.
Stephane Sessegnon also had two good opportunities, including one in the last minute after a mazy run, and created another for Morgan Amalfitano - but each time Asmir Begovic saved.
Stoke defender Erik Pieters said: "If you want to look at it in a positive way we got a point but we have to thank Asmir for saving that last chance.
"He did that twice. You do it as a team but Asmir was really important for us.
"We had two or three good chances and they had the same.
"It could have been 0-0 or 1-1, in the end you have to be happy with one point. We had a clean sheet and that was important for us.
"We didn't get the confidence out of this game, we didn't get the second half we wanted, but we didn't lose and that is the important thing."