The Canadian hasn't appeared for Harry Redknapp's side since January 1 but he could play some part against Manchester United at Loftus Road this weekend.
"It's been really frustrating, especially when a new manager comes in and you can't show him what you can do because of injuries," Hoilett told the Fulham Chronicle.
"I've been doing some rehab and strength work and hopefully [will] be ready for the next match.
"I've struggled with the same hamstring problem. Hopefully it's sorted now and I can get going. I feel I'm over it now."
QPR are currently 20th in the Premier League.