Sen. John McCain John Sidney McCainBiden's six best bets in 2016 Trump states Replacing Justice Ginsburg could depend on Arizona's next senator The Hill's Morning Report - Sponsored by Facebook - Washington on edge amid SCOTUS vacancy MORE (R-Ariz.) on Thursday clarified that his walking boot is on his right foot, adding that he switched it to his left to “give it a break.”

McCain caused confusion when he posted a photo from his daughter Meghan’s wedding in which his walking boot was on his left foot. He had previously been seen wearing it on his right foot after he suffered a minor tear in his right Achilles tendon.

Mother, father & puppy of the bride in beautiful Cornville #Arizona yesterday! pic.twitter.com/sd3rsye1OV — John McCain (@SenJohnMcCain) November 22, 2017

Some Twitter users noticed that he was wearing the boot on his other foot and began raising questions about McCain's injury.

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Y'all don't hear me. Why is John McCain's boot on another foot. Stop with that mirror crap. Wake up people. pic.twitter.com/A3NCjk1bnp — Where's my Dossier AfroCon (@kdlewis04) November 23, 2017

McCain took notice of the fallout, and on Thursday took to Twitter to clarify.

Thank you for your support & best wishes. My left leg was doing extra work to compensate for the boot, so I'm giving it a break. I still hate wearing this boot, but it won't slow us down from frying 7 turkeys today! — John McCain (@SenJohnMcCain) November 23, 2017

McCain has been receiving treatment for brain cancer after announcing in July that he had been diagnosed with glioblastoma, an aggressive form of the disease.

The tendon tear is considered a "normal" side effect of his cancer therapy.