"I've just been having some issues that I need to resolve, so I'm working on that at the moment and I'm hoping to be back playing as soon as possible," she said.
Last week, the six-time Grand Slam event champion announced her withdrawal from this week's Bausch & Lomb Championships, citing a medical issue. The powerful American played in Miami last week, and lost to U.S. Open runner-up Svetlana Kuznetsova in the quarterfinals.
Williams still wants to play at the French Open in late May.
"Of course I want to be there (in Paris)," the former world No. 1 said. "I don't want to be at home watching on TV."
Williams is currently ranked sixth in the world and 10-5 in her singles action this season.
Many people have been speculating that she is battling some kind of blood-borne infection. At the 2007 U.S. Open she said she was going to get tested for anemia after losing to Justine Henin in the Semifinals.
Mad Professah send best wishes to Venus in this trying time!