The rumours began after an unexpected medical visit.
The rumour mill spun into action on Monday after President Donald Trump's unscheduled visit to Walter Reed National Military Medical Centre at the weekend.
In previous years, Trump's annual medical check-ups have been scheduled. This weekend's visit came just nine months after his last examination.
Trump's physician Dr. Sean Conley has now issued a memo through the White House denying any reports that Trump's health is ailing.
"This past Saturday afternoon the President traveled up to Walter Reed National Military Medical Center for a routine, planned interim checkup as part of the regular, primary preventative care he receives throughout the year. Due to scheduling uncertainties, the trip was kept off the record."
Conley went on to say, "Specifically, [Trump] did not undergo any specialised cardiac or neurologic evaluations," and ruled out chest pains or acute issues.
Trump's health has been called into question before, particularly in August 2016, when his doctor Harold Bornstein said: ""If elected, Mr. Trump, I can state unequivocally, will be the healthiest individual ever elected to the presidency."
Trump, now 73, was the oldest person to ever be elected President of the United States back in 2016. He is up for re-election in 2020, and one of his potential challengers, Bernie Sanders, was hospitalised after suffering a heart attack earlier this year.