Watch: Clinton coughs sometimes, but does that really mean she's unwell?
Hillary Clinton had two coughing fits on the campaign trail on Monday, prompting inevitable cries from some conservative corners of the internet that the former Secretary of State is unwell.
It's not the first time either thing has happened. Clinton has periodically suffered coughing spells over the course of her political career -- spells which she and her campaign attribute to seasonal allergies and general over-exertion.
Ohio's worst state for allergies
On Sunday, for example, Clinton paused to cough during a press conference and a campaign rally in Ohio -- the worst state in the nation for respiratory problems due to allergies and pollution, according to the National Resources Defense Council.
And one of Clinton's more recent coughing spells was at the end of a hearing where Clinton testified before the House Select Committee on Benghazi for more than eight hours.
WATCH: Clinton coughs during Benghazi hearing
Drudge, Jones, @hillarycoughing
But the relative frequency of Clinton's public coughing compared to other politicians has become fodder for some to question whether Clinton is physically fit to serve.
Popular conservative news aggregator Matt Drudge is one of the leading conspiracy theory proponents, as is the controversial conservative radio host Alex Jones.
An anti-Clinton Twitter feed called @hillarycoughing also purports to track the former Secretary of State's respiratory episodes. The account has less than 1,000 followers.
Washington Post reporter Philip Rucker follows "cough-gate"
"A desire to portray her as lame and feeble"
"It's a desire to portray her as lame and feeble," the Washington Post's David Weigel recently told the Daily Beast in an extensive article about how Clinton's cough has been covered by the media.
"There's just this leftover sense that Hillary is old and frail and can be mocked for that, and it's accentuated because they [the conservative media] know that this pisses off liberals."
Hillary Clinton always keeps 2 throat lozenges and a glass of water under her podium jic, like today, she gets a coughing fit on stage.— Liz Kreutz (@ABCLiz) September 5, 2016
'Fit to serve'
There is no hard evidence that Clinton's cough is indicative of anything serious.
A 2015 letter from Clinton's doctor, Lisa Bardack, said that aside from minor maladies -- like "hypothyroidism and seasonal allergies" -- Clinton is "in excellent physical condition and fit to serve as President of the United States."
You can read the full letter here.
"One thing you know from my doctor letter is I have seasonal allergies," Clinton joked after returning to the gaggle following her cough— Liz Kreutz (@ABCLiz) September 5, 2016
Trump calls for medical records
Still, claims about Clinton's health have percolated into the national dialogue enough to where the Republican presidential nominee has publicly questioned her fitness for the presidency.
In August, Donald Trump said Clinton lacked the "mental and physical stamina" required of the presidency, and called on Clinton to release "detailed medical records."
I think that both candidates, Crooked Hillary and myself, should release detailed medical records. I have no problem in doing so! Hillary?— Donald J. Trump (@realDonaldTrump) August 28, 2016
Trump has also not released his medical records, though he pledged to on Tuesday.
The pickle jar conspiracy
Clinton herself addressed the rumors about her health, calling them a "paranoid fever dream" perpetuated by the "alt-right," a term describing the far right-leaning movement that has dabbled in conspiracy theories about Clinton's cough.
Clinton also opened a pickle jar on the late-night comedy show Jimmy Kimmel Live! to demonstrate that she was healthy enough for the White House.
WATCH: Conspiracy theorists, however, have seized on that, too. Following Clinton's Kimmel appearance, Alex Jones claimed the pickle jar was "pre-loosened" before the show.
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