Hame Sele has been cleared of heart issues after chest pains forced him to leave St George Illawarra's NRL loss to Canterbury in an ambulance.
The Dragons prop remained hospitalised on Sunday morning but took to Instagram to say his early exit from Saturday night's game had been "precautionary".
Sele played 21 minutes of the 28-10 defeat at Jubilee Oval, flagging his chest pains with a club trainer and leaving the field.
The Dragons were initially concerned he may have been suffering from an irregular heartbeat, but those concerns were allayed after arriving at hospital.
Club sources unauthorised to speak publicly told AAP Sele's issue was not heart-related, with the Dragons expected to elaborate in a statement later on Sunday.
"I appreciate everyone reaching out to check in on me," Sele wrote on Instagram late on Saturday night.
"I'm feeling better. Still in hospital waiting for the doctor but it's only precautionary. Much love."
A local junior, Sele returned to the joint venture this season after five seasons away playing for Penrith and then South Sydney.
He has averaged 85 run metres across 11 games in a season hampered by injuries.
It remains to be seen whether Sele will return to the field against Gold Coast next Sunday as St George Illawarra continue to push for their first finals berth since 2018.
Saints could be without five-eighth Kyle Flanagan, who has been referred directly to the judiciary after being accused of biting Bulldogs centre Stephen Crichton during Saturday's game.
Centre Moses Suli is under an injury cloud after suffering a suspected medical cruciate ligament injury in the second half against Canterbury.