The I Feel Pretty star posted a black-and-white snap of herself standing outside wearing only a flannel shirt, underwear and slippers. Schumer's black dog Tati could be spotted standing in the background.
"On the mend," the 36-year-old comedian aptly captioned the photo on Wednesday night.
Last week, the actress took to Instagram to let fans know she wouldn't be able to make the U.K. premiere of her movie, I Feel Pretty, as planned due to a sudden hospitalization.
"Here’s what I’ve been up to this week. I was hospitalized for five days with a horrible kidney infection," she shared alongside a photo of herself lying in a hospital bed. "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."
She added that she was "disappointed" but needed to make her health a priority.
"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," she wrote. "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."