Amy Schumer (Getty Images)

Amy Schumer spent five days in the hospital this week being treated for a “horrible kidney infection,” the actress said in an Instagram post Friday morning.

In the post, Schumer said that the illness caused her to miss the opening of her new film “I Feel Pretty.”

Schumer also thanked her husband, Chris Fischer, and sisters for their support during her medical issue, as well as the hospital staff that treated her.

Also Read: 'I Feel Pretty' Film Review: Amy Schumer Teaches a Despicable Lesson in Self-Love

“Here’s what I’ve been up to this week. I was hospitalized for five days with a horrible kidney infection,” Schumer wrote. “I want to give a big thank you to the doctors, the bad ass nurses also my husband who’s name is, i want to say, Chris? and my sisters Kimby and mol who have been by my side the whole time.”

Schumer continued, “I wanted to share this with you because this is sexy as hell but mostly because I was meant to go to London for the opening of I Feel Pretty and my doctors have told me that’s a no go. I’m really disappointed selfishly to miss this trip because I love London and Europe in general and all the great people (food) there. But I need to put my health first.”

The actress concluded, “I am so grateful for all the support the movie is getting. I hope people check it out in England and everywhere else in the world. It’s sweet and fun and you will walk out feeling better. Which is something I hope to feel soon too.”

Also Read: Amy Schumer's 12 Best Moments: From a 'Slutty' Tattoo Joke to That Startling Cheer Dance (Photos)

Read the post below.

Here’s what I’ve been up to this week. I was hospitalized for 5 days with a horrible kidney infection. I want to give a big thank you to the doctors, the bad ass nurses also my husband who’s name is, i want to say, Chris? and my sisters Kimby and mol who have been by my side the whole time. I wanted to share this with you because this is sexy as hell but mostly because I was meant to go to London for the opening of I Feel Pretty and my doctors have told me that’s a no go. I’m really disappointed selfishly to miss this trip because I love London and Europe in general and all the great people (food) there. But I need to put my health first. I am so grateful for all the support the movie is getting. I hope people check it out in England and everywhere else in the world. It’s sweet and fun and you will walk out feeling better. Which is something I hope to feel soon too.

A post shared by @ amyschumer on Apr 27, 2018 at 8:39am PDT

“I Feel Pretty” opened to $16 million from 3,440 screens domestically last weekend — slightly higher than pre-weekend projections, but lower than the $19.5 million start made by Schumer’s last film, “Snatched.” The comedy has a 34 percent on Rotten Tomatoes.

Evolution of Amy Schumer: From Stand Up Comic to 'I Feel Pretty' (Photos)

Long before we all came to know and love the charming witty multi-hyphenate, Amy Schumer was once an unknown comic longing for her big break.
Getty Images
2003

Schumer enters the world of stand-up comedy. She performs her first ever gig at Manhattan’s Gotham Comedy Club shortly after graduating from Towson University in Maryland.
Getty
2007

Schumer appears on a Comedy Central episode of "Live at Gotham," which showcases comedians performing at the New York City comedy club.
Getty Images
2007

After previously auditioning for but not booking it, the comedian finally makes it on to the fifth season of "Last Comic Standing," where comedians compete for $250,000 and a TV special.

Schumer placed fourth.
Instagram
2011

Schumer applies to be a writer on the "Comedy Central Roast of Charlie Sheen," but doesn't get the job -- instead, she gets to be a roaster.

She received a great deal of attention for her jokes. Not all of it positive.
Getty Images
2012

Schumer's comedy special "Mostly Sex Stuff" premieres on Comedy Central where she discusses ... well, mostly sex stuff.

According to the Washington Post, Schumer's comedy special was the second highest rated Comedy Central special in five years.
Comedy Central
2013

Schumer premieres "Inside Amy Schumer" on Comedy Central, her first comedy pilot. The sketch show was renewed for a fifth season in 2016.
Comedy Central
2015

Schumer hosts the 2015 MTV Movie Awards, where she gets praised for her great jokes.
Getty Images
2015

Time Magazine names Schumer one of its 100 Most Influential People of 2015.

The magazine wrote:

"Amy’s got your back.
She’s in your corner.
She’s an honesty bomb.
And she’s coming for you."
Getty
2015

"Trainwreck" (co-starring Bill Hader) put Schumer on the map as both a gifted writer and actress. She earned a nomination from the Writers Guild of America for Best Original Screenplay and won a Golden Globe for Best Actress -- Motion Picture Comedy or Musical.
Universal Pictures
2016

Schumer was joined on stage at the 2016 Golden Globe Awards by Jennifer Lawrence, and they quickly became Hollywood's most loved BFFs.
NBC
2016

The comedian releases a memoir titled "The Girl With the Lower Back Tattoo." The book rose to the No. 1 spot on the New York Times Best Seller List.
Getty Images
2016

Schumer was in talks to play Barbie in a live-action movie for Sony based on the iconic Mattel line of dolls; the deal later fell through.
Getty
2017

The comedian co-starred with Goldie Hawn in R-rated comedy "Snatched" about a super-cautious mom (Hawn) who joins her daughter (Schumer) on a jungle vacation to Ecuador that goes horribly, horribly wrong.
Twentieth Century Fox
2017

Schumer made her Broadway debut in November 2017 in Steve Martin's comedy "Meteor Shower" opposite Keegan-Michael Key, Laura Benanti and Jeremy Shamos.
2018

Schumer starred in the comedy "I Feel Pretty" about a woman who finds confidence and self-esteem after suffering a head injury. Schumer took on criticism of the movie's body image themes. “I heard a lot of, ‘She doesn’t have a right to feel bad about herself because she looks however she looks,'” Schumer said, adding that the movie is “not about an ugly troll becoming beautiful, it’s about a woman who has low self-esteem finding some … Everyone’s got a right to feel that feeling, regardless of their appearance.”
STX Entertainment