The attacker believes Jurgen Klopp's men will soon be back to their usual best again after a string of disappointing results
Dortmund have won just one out of their last five Bundesliga games and have consequently dropped to third place in the table, trailing leaders Bayern Munich by 12 points.
However, Reus is not panicking just yet and has little doubt that they will soon be back to their usual best.
"The fans don't have to be afraid. We will get out of this stronger than ever before," Reus was quoted as saying by Bild.
"We want to give our amazing fans a nice gift in our last home game before the winter break by beating Hertha.
"We all know that we were in better form at the start of the season, when we were all much more consistent.
"It would be a real problem if we didn't create any chances at all, but we still create plenty of chances. We have just been unlucky."
Reus has been a key figure for Dortmund so far this season, scoring seven goals in 16 Bundesliga appearances.