The news comes just days after Gomez announced she'd be taking a break from social media.
Gomez wrote, “As much as I am grateful for the voice that social media gives each of us, I am equally grateful to be able to step back and live my life present to the moment I have been given. Kindness and encouragement only for a bit! Just remember— negative comments can hurt anybody’s feelings. Obvi."
Gomez also suffers from lupus, an inflammatory disease caused when the immune system attacks its own tissues.
It was first revealed in 2015 that she’d undergone chemotherapy to treat the disease.
In 2016, Gomez's best friend Francia Raisa donated the star a kidney.