The White House on Thursday said President Donald Trump is suffering from a chronic vein condition amid speculation over his health after photographs emerged showing bruising in his hand.

White House Press Secretary Karoline Leavitt said the President had mild swellings in his lower legs in recent weeks.

"In keeping with routine medical care and out of an abundance of caution, this concern was thoroughly evaluated by the White House Medical Unit," she said.

The statement said Trump underwent a comprehensive examination, including diagnostic vascular studies.

"The president underwent a comprehensive examination, including diagnostic vascular studies, bilateral lower extremity intravenous doppler ultrasounds were performed and revealed chronic venous insufficiency, a benign and common condition, particularly in individuals over the age of 70," Levitt said in the statement.

Speaking on Trump's bruised hands, Levitt said it was consistent with minor soft tissue irritation from frequent handshaking and the use of aspirin, which is taken as part of a  standard cardio-vascular prevention regimen."

The statement said the tests showed there were "no signs of heart failure, renal impairment, or systemic illness" in Trump.

"President Trump remains in excellent health," the statement summed up.

What did experts say?

Doctors told the BBC they agree with White House physician Sean Barbabella's assessment on the severity of chronic venous insufficiency.

"It can be associated with serious conditions, but in and of itself it is not a serious condition, and one that is very common," Dr Matthew Edwards, chair of the Department of Vascular Surgery at Wake Forest University, told the BBC.

"People in his age (group), I would say probably somewhere between 10 and 35% of people would have this."