The Slovenia-born first lady underwent an embolisation procedure on Tuesday morning to treat what aides called a "benign" kidney condition.
"The procedure was successful and there were no complications", Stephanie Grisham, the first lady's communications director, said in a statement. Two doctors who specialize in kidney health speculated that the procedure may have been to treat angiomyolipoma, a benign kidney tumor, detailed the Sacramento Bee.
In response to follow-up questions about the first lady's condition, Grisham told PEOPLE there was "nothing more I can expand on, aside from the statement".
Vice President Mike Pence says the medical procedure that first lady Melania Trump underwent to treat a kidney condition was "long-planned".
Monday evening, the president posted on Twitter that he was heading over to the military medical facility to see the first lady. Mrs. Trump could well be staying in the hospital simply as a precaution.
They're not common but tend to occur in middle-aged women, and if they become large enough, they can cause problematic bleeding, said Dr. Keith Kowalczyk of MedStar Georgetown University Hospital.
She underwent the surgery at the Walter Reed National Military Medical Centre in Bethesda on Monday, New York Post reported.
He says "she is in good spirits", and adds, "Thank you to all of the well-wishers!" Some patients do not react well to the embolization itself and doctors may be keeping the first lady there as a precaution, he said.
Meanwhile, the White House has not released further details about the exact condition Melania was treated for.
Trump is working on an anti-bullying campaign to teach children to behave with more consideration and kindness on social media.
Last week, the first lady launched her "Be Best" initiative to help children be their best selves.
Thankfully, Melania's procedure was completed successfully without complications, and many are wishing her a speedy recovery.