The walking boot that Sen. John McCain has worn since receiving treatment for a recent injury appears to have swapped feet.

The Arizona Republican tweeted on Wednesday a photo of himself sitting next to his wife, Cindy McCain, attending their daughter's wedding at their ranch in Arizona.

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



The boot, which McCain has worn since his treatment for a minor tear in his right Achilles tendon at the beginning of the month, has appeared on his right foot in a number of photos the senator has shared on Twitter in the last couple weeks.

I can't tell you how much I hate wearing this boot! https://t.co/W6zClDRpFb pic.twitter.com/x3mDC4n11H — John McCain (@SenJohnMcCain) November 6, 2017



But Twitter users Wednesday noted that the boot in the latest photo appeared to be on his left foot. It was unclear whether the photo McCain shared was mirrored for some reason, but it did prompt a fierce debate and conspiracy theories on social media.

We can tell by the buttons on John McCain's jacket (circled) that neither of these images are reversed, and his walking boot did in fact, switch legs, from his right to his left. Bet that brain tumor is fake, too. #NotAHero pic.twitter.com/56lwi8bQ5H — Meme Chaos (@ExtinctMedia) November 23, 2017

The theory that John McCain is wearing a medical boot to hide his ankle monitor as a criminal defendant just got legs.



His Achilles tendon injury (the reason he's allegedly wearing the boot) seems to have magically switched legs. pic.twitter.com/16PCb044L4 — n o w o r l d o r d e r . c o m 🅥 (@stacksNoWO) November 23, 2017

👇🏻Boot on the right foot Boot on the left foot👇🏻

John McCain is either faking an injury or too senile to hold officehttps://t.co/wPYHKUztQk#WednesdayWisdom pic.twitter.com/oLADt3uqqB — Cari Kelemen 🇺🇸 (@KelemenCari) November 22, 2017



On Thursday, Thanksgiving, McCain tweeted an explanation for the swap, saying that his left leg had been "doing extra work to compensate for the boot" so he had been "giving it a break."

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, who is 81 years old, was also diagnosed with stage four glioblastoma, an aggressive form of brain cancer, over the summer. He has since returned to Washington, D.C., for work following the first round of chemotherapy and radiation.