Anderson, 28, was allowed to go back home to New Zealand in January for family reasons, but has now returned to the Gilbert Brutus Stadium, although he won’t be available to face Leeds on Friday.
He said: “I’m happy to be back in France.”
“I needed to be close to my family and I feel a lot better now.
“I really look forward to go back to the training with the boys. I missed France, my team mates and playing and I hope to be back on the field as soon as possible.”
Anderson is in his third season with the Dragons, having previously spent four seasons with Warrington.