Trump is scheduled to travel to Canada for the G7 summit this week and then to Singapore for the on-again, off-again nuclear arms summit with North Korean dictator Kim Jong-un.
A reporter for CNBC tweeted that he saw the first lady in the White House on May 29 with her aides.
Several internet conspiracy theories raging from plastic surgery to a stealth move back to New York City have been circulated on the social media regarding the First Lady.
The first lady joined the president for his first G7 trip to Italy a year ago, where she joined the spouses of other G7 leaders at public events.
The First Lady has not been seen publicly for 24 days.
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Where in the world is Melania Trump?
In a tweet, she revealed how she was doing and reiterated that she was still "working hard".
Her first clue that she would be a different first lady came when she made a decision to continue living at Trump Tower after her husband took office in January 2017, citing a desire to maintain stability for her son's schooling.
"Mrs. Trump is very strong and independent", Grisham said. "We've been going over initiatives and other long-term planning for events such as the congressional picnic and Fourth of July", Grisham said.
Comedian Sarah Silverman retweeted Melania's tweet with her own comment: "Who is this? where's Melania?"
The absence of the intensely private first lady has prompted widespread speculation and conspiracy theories.
First ladies are under no obligation to release updates on their health.
The FLOTUS has not attended a public event in almost a month. "Uniquely and remarkably, I think the press's attitude towards the First Lady of the United States is that of victim".