Reports today said that the English defender was rushed to hospital after being stung by a jellyfish while out surfing on the coast of the Indonesian island.
Pictures also surfaced of Smalling laying back on a stretcher with a bandage around his head and arm while signing an autograph for a fan.
But United have moved to reassure supporters that there was no jellyfish incident – and instead Smalling was simply suffering from a bout of food poisoning.
In a statement published on manutd.com, the club said: “Manchester United can clarify Chris Smalling has had food poisoning during his holiday which resulted in him fainting on Sunday.
“The 26-year-old defender was taken to the hospital and is now feeling fine.
“Smalling is currently on vacation in Bali following his time with England at Euro 2016 before reporting back for pre-season training later this month.
“Chris would like to thank everyone for their well wishes.”
Panic over United fans – a jellyfish won’t deny Jose Mourinho his best defender for the start of pre-season.
Speaking of which, the squad will be back preparing for the new English campaign later this month and will fly out to China for a tour before returning home to fine tune things get competitive.
Mourinho will have new signings Eric Bailly and Zlatan Ibrahimovic to work with then, while Henrikh Mkhitaryan is also expected to join the club over the coming week.