"It's looking pretty good and hopefully I'll be back in the middle of October," Henson told BBC Wales.
"I'll speed things along after the next few days' training sessions.
"All my symptoms have gone so that's great news. I'm just a little sore from the cut from the operation."
The centre had feared he would miss Wales' defence of the Six Nations Championship as the operation, which he underwent in Germany, could have ruled him out for six months.