Selena Gomez says she has received a kidney transplant due to her struggle with lupus.

Gomez writes in an Instagram post confirmed by her publicist early Thursday that she has been somewhat out of the spotlight this summer because she was recovering from the procedure.

Here’s the post: “I’m very aware some of my fans had noticed I was laying low for part of the summer and questioning why I wasn’t promoting my new music, which I was extremely proud of. So I found out I needed to get a kidney transplant due to my Lupus and was recovering. It was what I needed to do for my overall health. I honestly look forward to sharing with you, soon my journey through these past several months as I have always wanted to do with you. Until then I want to publicly thank my family and incredible team of doctors for everything they have done for me prior to and post-surgery. And finally, there aren’t words to describe how I can possibly thank my beautiful friend Francia Raisa. She gave me the ultimate gift and sacrifice by donating her kidney to me. I am incredibly blessed. I love you so much sis. Lupus continues to be very misunderstood but progress is being made.”

The post didn’t reveal Gomez’s current condition or say where or when the procedure took place, although TMZ reports that while she was in Chicago in May for a concert by boyfriend The Weeknd, Gomez was rushed to a hospital for kidney failure.

Gomez’s publicist declined to release more information.

The Instagram post includes a picture of Gomez and Raisa holding hands while lying side-by-side in hospital beds. Gomez also posted a picture of a scar on her abdomen.

Gomez revealed her lupus diagnosis in 2015.