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Aris Folley, AOL.com

Jun 15th 2017 4:08PM

Of all of the strange theories about Donald and Melania Trump, this one is possibly the most bizarre.

On Wednesday it was the 71st birthday of President Donald Trump and his wife wished him well via Twitter.

But a subtle detail on the image of a birthday card she tweeted to her husband has left many online scratching their heads -- a small orange dot.

Since she published the image on Wednesday evening, more than 40,000 users have "liked" the first lady's post -- and many have speculated on about whatever could have caused the glaring stain.

RELATED: Donald and Melania Trump through the years

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Donald and Melania Trump through the years

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Real estate magnate Donald Trump (L) and his girlfriend Melania Knauss leave Hollinger International's annual meeting at the Metropolitan Club in New York on May 22, 2003. Hollinger publishes The Chicago Sun-Times, The Daily Telegraph of London, the Jerusalem Post and other newspapers. REUTERS/Peter Morgan PM/ME

Donald Trump and his girlfriend Melania Knauss arrive at the Vanity Fair Oscar party at Morton's restaurant in West Hollywood, California, February 29, 2004. REUTERS/Ethan Miller REUTERS EM/AS

Real estate tycoon Donald Trump and his friend Melania Knauss pose for photographers as they arrive at the New York premiere of Star Wars Episode I: "The Phantom Menace," May 16. JC/SV/AA

From left, Billy Crystal, host of the 76th annual Academy Awards, his wife Janice Goldfinger, Melania Knauss and her boyfriend Donald Trump, pose together as they leave the Vanity Fair Oscar party at Morton's restaurant in West Hollywood, California, early March 1, 2004. REUTERS/Ethan Miller EM

Developer Donald Trump (R) and his girlfriend Melania Knauss pose for photographers after the final show of "The Apprentice" April 15, 2004 in New York. Bill Rancic, a 32-year-old Internet entrepreneur from Chicago, edged out Kwame Jackson, a 29-year-old New Yorker and Harvard MBA, for the Trump-described "dream job of a lifetime" and its $250,000 salary. REUTERS/Jeff Christensen JC

Donald Trump's new bride, Slovenian model Melania Knauss, waves as they leave the Bethesda-by-the-Sea Episcopal Church after their wedding in Palm Beach, Florida, January 22, 2005. REUTERS/Gary I Rothstein

Sean 'P. Diddy' Combs (R) accepts an award from the Rush Philanthropic Foundation for his efforts to support public education and dedication to youth and social activism, from Donald Trump and his wife Melania (L) at Trump's Trumps Mar-A-Lago Club in Palm Beach, Florida on March 11, 2005. REUTERS/Jason Arnold MS

Donald Trump and his wife Melania Kanauss watch the Miami Heat play the New York Knicks in the first quarter of their NBA game in New York's Madison Square Garden, March 15, 2005. REUTERS/Ray Stubblebine RFS

Donald Trump (L) and his wife Melania arrive at the Museum of Modern Art for a reception in honor of Britain's Prince Charles and his wife Camilla, Duchess of Cornwall, in New York November 1, 2005. The Royals are on the first day of an eight-day visit to the U.S. REUTERS/Gary Hershorn

Donald Trump arrives with wife Melania at a reception in honor of Britain's Prince Charles and Camilla, Duchess of Cornwall, at The Museum of Modern Art in New York, November 1, 2005. REUTERS/Brendan McDermid

Donald Trump (L) and his wife Melania (R) arrive at the Museum of Modern Art for a reception in honor of Britain's Prince Charles and his wife Camilla, Duchess of Cornwall, in New York, November 1, 2005. The royals are on the first day of an eight-day visit to the U.S. REUTERS/Gary Hershorn

Real estate tycoon Donald Trump and his wife Melania attend a Miami Heat against the Los Angeles Lakers NBA game on Christmas Day in Miami, Florida, December 25, 2005. REUTERS/Marc Serota

Donald Trump stands next to his wife Melania and their son Barron before he received a star on the Hollywood Walk of Fame in Los Angeles January 16, 2007. REUTERS/Chris Pizzello (UNITED STATES)

Real estate magnate and television personality Donald Trump and his wife Melania stand on the red carpet at the Metropolitan Museum of Art Costume Institute Benefit celebrating the opening of the exhibition "Alexander McQueen: Savage Beauty" in New York May 2, 2011. REUTERS/Mike Segar (UNITED STATES - Tags: ENTERTAINMENT FASHION BUSINESS)

Businessman and real estate developer Donald Trump and his wife Melania watch Rafael Nadal of Spain play against Tommy Robredo during their men's quarter-final match at the U.S. Open tennis championships in New York September 4, 2013. REUTERS/Adam Hunger (UNITED STATES - Tags: SPORT TENNIS ENTERTAINMENT REAL ESTATE BUSINESS)

U.S. Republican presidential candidate Donald Trump (2nd from L) watches with his wife Melania as Serena Williams of the U.S. plays against her sister and compatriot Venus Williams in their quarterfinals match at the U.S. Open Championships tennis tournament in New York, September 8, 2015. REUTERS/Lucas Jackson

U.S. Republican presidential candidate Donald Trump kisses his wife Melania as he speaks at a campaign rally on caucus day in Waterloo, Iowa February 1, 2016. REUTERS/Rick Wilking

U.S. Republican presidential candidate Donald Trump speaks as his wife Melania listens at a campaign rally on caucus day in Waterloo, Iowa February 1, 2016. REUTERS/Rick Wilking

U.S. Republican presidential candidate Donald Trump reacts to an answer his wife Melania gives during an interview on NBC's 'Today' show in New York, U.S. April 21, 2016. REUTERS/Brendan McDermid

Melania Trump gestures at her husband Republican U.S. presidential candidate Donald Trump as they leave the stage, after she concluded her remarks at the Republican National Convention in Cleveland, Ohio, U.S. July 18, 2016. REUTERS/Mike Segar TPX IMAGES OF THE DAY

Melania Trump appears on stage after U.S. Republican presidential nominee Donald Trump speech at the Republican National Convention in Cleveland, Ohio, U.S. July 21, 2016. REUTERS/Mike Segar

Republican U.S. presidential nominee Donald Trump greets his wife Melania onstage after the conclusion of his first debate with Democratic U.S. presidential nominee Hillary Clinton at Hofstra University in Hempstead, New York, U.S., September 26, 2016. REUTERS/Joe Raedle/Pool

(L-R) Donald Trump Jr., Eric Trump, Republican U.S. presidential nominee Donald Trump, Melania Trump, Tiffany Trump and Ivanka Trump attend an official ribbon cutting ceremony at the new Trump International Hotel in Washington U.S., October 26, 2016. REUTERS/Gary Cameron TPX IMAGES OF THE DAY

Republican presidential nominee Donald Trump cuts the ribbon at his new Trump International hotel in Washington, DC, U.S., October 26 2016. REUTERS/Carlo Allegri

Republican presidential nominee Donald Trump kisses his wife Melania Trump at a campaign rally in Wilmington, North Carolina Florida, U.S. November 5, 2016. REUTERS/Carlo Allegri TPX IMAGES OF THE DAY

Republican U.S. President-elect Donald Trump kisses his wife Melania at his election night rally in Manhattan, New York, U.S., November 9, 2016. REUTERS/Jonathan Ernst

U.S. President-elect Donald Trump and his wife Melania take part in a Make America Great Again welcome concert in Washington, U.S. January 19, 2017. REUTERS/Jonathan Ernst

U.S. President-elect Donald Trump and his wife Melania take part in a Make America Great Again welcome concert in Washington, U.S. January 19, 2017. REUTERS/Jonathan Ernst

U.S. President Donald Trump and first lady Melania Trump attend the Liberty Ball in honor of his inauguration in Washington, U.S. January 20, 2017. REUTERS/Jonathan Ernst

U.S. President Donald Trump and First Lady Melania Trump attend the 60th Annual Red Cross Gala at Mar-a-Lago club in Palm Beach, Florida, U.S., February 4, 2017. REUTERS/Carlos Barria TPX IMAGES OF THE DAY

U.S. President Donald Trump and First Lady Melania Trump greet a marching band as they arrive at Trump International Golf club to watch the Super Bowl LI between New England Patriots and Atlanta Falcons in West Palm Beach, Florida, U.S., February 5, 2017. REUTERS/Carlos Barria

U.S. President Donald Trump hugs his wife Melania during a "Make America Great Again" rally at Orlando Melbourne International Airport in Melbourne, Florida, U.S. February 18, 2017. REUTERS/Kevin Lamarque

U.S. President Donald Trump holds up H.R. 321 as his daughter Ivanka Trump (C) and U.S. first lady Melania Trump (2nd R) watch after it was signed in the Oval Office of the White House, in Washington, DC, U.S. February 28, 2017. REUTERS/Joshua Roberts

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Here are a few ideas, according to the people of Twitter.

Some argued the small dot came from the president's finger print, given his previous issues with the size of his hands.

Others linked the mark to covfefe -- the president's Twitter typo from late May that's taken on a whole new meaning.

And then came the spray tan jokes.

SEE ALSO: First lady Melania Trump slaps at President Trump's hand on Tel Aviv tarmac in Israel

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Tiny mark on Melania Trump's birthday card to Donald Trump sparks wild theories - AOL