Democratic presidential candidate Hillary Rodham Clinton waves as she is introduced before speaking to the National Urban League, Friday, July 31, 2015, in Fort Lauderdale, Fla. (AP Photo/Wilfredo Lee)

Hillary Rodham Clinton’s doctor has pronounced her fit and healthy despite a concussion and associated medical problems in 2012, according to an assessment released by the Clinton campaign on Friday.

Clinton is a healthy 67-year-old with a history of hyperthyroidism and deep vein thrombosis, internal medicine specialist Dr. Lisa Bardack wrote in summarizing Clinton’s health. The “health letter” was released on the same day the campaign also plans to release seven years of joint tax returns for Hillary Clinton and former president Bill Clinton. The tax records will cover 2007-2014 and will for the first time show how much both Clintons were paid for speeches in 2013, a campaign official said.

The campaign made both sets of documents available the same day the State Department released the latest crop of e-mails from Clinton's tenure as secretary of state.

[Full letter from Clinton's doctor]

The official spoke on condition of anonymity ahead of the release later Thursday. The documents will be posted to Clinton’s campaign website.

The official also provided a copy of Bardack’s letter, which gives the fullest public account to date of the incident in 2012 in which Clinton, dehydrated from a stomach virus, fell and suffered a concussion. Clinton was found to have a complication, called a transverse sinus venous thrombosis, that was treated with anti-coagulent drugs, Bardack wrote. She also suffered from double vision, and wore special glasses for several months as a result.

Clinton’s fall and hospitalization forced her to cancel her final scheduled trip as secretary of state and forced the postponement of a congressional hearing at which Republicans planned to ask her about the fatal attacks in Benghazi, Libya, three months before.

When Clinton appeared for the rescheduled hearing, in January 2013, she wore the special glasses. It was at that session that she angrily told a senator, “what difference, at this point, does it make?” whether the attackers were terrorists or criminals.

Follow-up testing in 2013 showed that the double vision had cleared up and the thrombosis has dissolved, Bardack wrote.

Clinton is still taking anti-coagulents, Bardack wrote.

The letter from Bardack does not contain detailed medical records or a medical history from Clinton other than the doctor’s brief summary of the candidate’s few prior health issues.

Clinton has visibly lost weight in recent months, but the letter does not address that. Bardack notes that Clinton exercises, including doing yoga.

Bardack said Clinton maintains a healthy lifestyle, does not smoke or take drugs and drinks alcohol occasionally.