US President Donald Trump has been diagnosed with a long-term but benign vein condition.

This was announced by the White House after speculation about his severely bruised hand and swollen leg, AFP reported.

The 79-year-old president has been diagnosed with "chronic venous insufficiency" after "noticing slight swelling in his lower legs" in recent weeks, White House press secretary Karoline Leavitt said.

Leavitt said the widely discussed blue discoloration of Trump's right hand was the result of "frequent handshaking" and the use of aspirin in a "standard regimen for cardiovascular prevention."

Trump became the oldest person in US history to hold the presidency when he began his second term in January this year, replacing Democrat Joe Biden, who was 82 when he left office.

The Republican often boasts about his energy and regularly plays golf, and his administration recently even published a photo depicting him as Superman.

In April, Trump said after a routine medical examination that he was in "very good shape."

Leavitt's revelations come after a wave of online discussions about the president's visibly swollen ankles, noticed in particular at the recent FIFA Club World Cup final in New Jersey, and the blue discoloration of his right hand.

Leavitt said the president asked her to share a note from his doctor about the diagnosis "in the interest of transparency."

She explained that Trump had undergone a "complete medical examination" and that ultrasound tests had "revealed chronic venous insufficiency, a benign and common condition, especially in people over the age of 70."

The condition involves damaged veins in the legs that fail to maintain proper blood circulation. | BGNES