The 82-year old former forward, known as one of the greatest players of all time, posted a photo in which a picture of his face is projected on a building in Qatar, next to a message which says "Get well soon."
"Friends, I am at the hospital making my monthly visit," he said in the post. "It's always nice to receive positive messages like this. Thanks to Qatar for this tribute, and to everyone who sends me good vibes!"
On Tuesday, Pele was admitted to a hospital in Sao Paulo to re-evaluate a cancer treatment after he had a tumor removed from his colon in September 2021.
Pele, who has led Brazil to three world cup titles - 1958, 1962 and 1970 - has suffered health issues in recent years, but has remained active in social media.
Last month, he said he hoped to see Brazil's national squad capture a record-extending sixth title in Qatar.
