What is the serious illness that Melania Trump suffers from?

After her long absence and many doubts about her health, US President Donald Trump spoke for the first time to reporters about the details of the health condition of the First Lady of America, Melania Trump, whose absence for nearly a month occupied the American public, and there were many rumors about her having cancer and being subjected to domestic violence at the hands of Trump.
In his statements to reporters prior to his departure, Friday, to Canada to participate in the G12 summit that was held in Canada and then to Singapore for the upcoming summit on June XNUMX with North Korean leader Kim Jong Un, Trump said that Melania wanted to accompany him to Canada and Singapore, but she could not. Flying for a month on the recommendation of her doctor, quoting the British “Daily Mail”.

Melania's office had not previously announced surgery, and said that she would undergo medical procedures in the kidneys, and it later turned out that she was suffering from a blockage.

Melania is banned from flying for a month after kidney surgery that lasted 4 hours
Kidney obstruction surgery usually takes about 3 hours on average, so the extended timing of Melania's surgery indicates that the condition was progressive.
During his remarks at the White House, Trump pointed a finger at the East Wing, and said of Melania: "She's wonderful...there."
This is the first time that Melania's surgery has been announced, and the word "surgery" did not appear in the statement her office issued when she entered Walter Reed Military Medical Center on May 14. Melania spent 5 days in the center after the aforementioned statement was released.