Article continues below advertisementDonald Trump is sparking fresh concern about his health after another public appearance showed what looked like a serious issue with his right hand.During a signing ceremony on Thursday, December 4, with the president of Rwanda and the president of the Democratic Republic of the Congo at the Institute of Peace in Washington, D.C., cameras caught Trump's hand looking bruised and discolored. A band-aid covered part of the back of his hand, and his veins appeared noticeably darker as he stood near the podium while the other leaders delivered remarks.