If surgery is required then 23 year-old Henson will miss Wales's Autumn International series plus their RBS Six Nations campaign as well as the majority of the domestic season with the Ospreys.
The British Lion has flown to the renowned Hans Muller-Woolfhart clinic in Germany for a diagnosis and will discover his fate when he joins up with his region for training in France next week.
The Ospreys star was at the centre of his region's Celtic League triumph and Wales's Grand Slam-winning side last season despite playing for most of it while receiving a prolonged course of anti-inflammatory injections.
The news comes as a bitter blow to Henson following an indifferent tour to New Zealand during which he suffered heartache when left out of the Lions' line-up for the first test against the All Blacks.
Ospreys Team Manager Derwyn Jones has played down the significance of Henson's visit to Germany saying: "Gavin has got a groin problem. He is just going to get it checked out."
Wales Head Coach Rob Howley talks to WRU TV's Sebastian Barrett about the 36-man squad he has just named for the forthcoming Under Armour series, which includes two uncapped players, Ospreys duo Sam Davies and Rory Thornton.
Head coach Rowland Phillips is deligthed he can now call BT Sport Cardiff Arms Park home for his Wales Women's side, who launch their international season next month with games against Scotland and UK Armed Forces in the heart of the capital city.
Wales Sevens star Sam Cross has put his home town club of Brynmawr on the map after winning a silver medal at the Rio Olympics with Team GB. His club have now honoured him by naming their players bar after him, as WRU TV discovered at the official launch, recently.
One of the newest members of the Principality Premiership, Bargoed admit it's proving to be a steep learning curve at the highest level, but are determined to become a force to be reckoned with. WRU TV visited the club last weekend when they took on Llanelli.
Table-topping Aberavon travel to north Wales to tackle RGC 1404 as both teams defend unbeaten starts to the season in the Principality Premiership. WRU TV's Graeme Gillespie visited the Wizards to see how their preparations were going for the game of the weekend.
The Half a Game initiative is currently sweeping across Wales and proving a major success. The scheme aims to give every young player at least half a game every weekend. WRU TV recently visited a festival in Narberth where clubs have fully embraced the initiative.
Both Bargoed and Swansea were seeking their first win of the Principality Premiership season this afternoon. It proved a fruitful day for the hosts - not only did they win, but Bargoed claimed a try bonus point.