The Queen sparked health concerns today after she was photographed with her hand noticeably purple at Buckingham Palace.

The 92-year-old monarch was pictured smiling as she joined with Princess Anne to host King Abdullah, Queen Rania and Crown Prince Hussein of Jordan yesterday.

But eagle-eyed Twitter users noticed that Her Majesty's left hand appeared to be bruised as she posed for official photographs in London.

The Queen with King Abdullah and Queen Rania of Jordan at Buckingham Palace yesterday

Eagle eyed Twitter users noticed that the Queen's hand seemed bruised or otherwise injured

Royal fan Tracy Edgar tweeted: 'I'm concerned. Why does she have such a terrible bruise on her left hand? Did I miss something? But as always, she looks stunning!'

Catherine Longstaff said: 'The lady is 92. At that age any little knock unfortunately turns into what can look severe bruises. The Queen is rather fab though isn't she?'

Colleen White added: 'Oh my... HM does look like she hurt her hand... Hope it heals quickly', while Nola Hennessy said: 'Best wishes for speedy healing.'

The Queen enjoys excellent health, although did have to pull out of a service at St Paul's Cathedral last June because she was feeling 'under the weather'.

One month earlier the Queen underwent eye surgery to remove a cataract and wore sunglasses in public to avoid having to cancel long-planned engagements.

The Jordanian royals began their UK visit at the Jordan Growth and Opportunity Conference, hosted by International Development Secretary Penny Mordaunt.

Jordanian Prime Minister Omar Razzaz was also in attendance. They also met Prime Minister Theresa May at Downing Street as part of their visit yesterday.

The conference was intended for global leaders of businesses, government and international agencies to get behind Jordan's plans for economic growth.

The Queen (centre) is joined by Crown Prince Hussein and Queen Rania (left) and King Abdullah and Princess Anne (right) at Buckingham Palace yesterday

Princess Anne curtseys for Queen Rania during a private audience at Buckingham Palace

The Jordanian royal couple are parents to Crown Prince Hussein, 24, Princess Iman, 22, Princess Salma, 18, and Prince Hashem, 14.

Yesterday, Mrs May said the UK would underwrite a £188million World Bank loan to Jordan to help it borrow money at a lower rate and manage its national debt.

Britain will also increase its grant financing to Jordan over the next five years, Mrs May said, to attract the investment needed for creating jobs.

US treasury secretary Steve Mnuchin, the World Bank's Kristalina Georgieva and EU foreign affairs representative Federica Mogherini also attended the conference.

A Buckingham Palace spokesman declined to comment when contacted by MailOnline today.