"I had to get some minor surgery (OK, so that's overstating it, but you know what blokes are like)," Ricciardo wrote in a column for the Red Bull website of how he had spent the two weeks since winning in Shanghai.
"I had this weird thing with my lip happen in Bahrain the weekend before where I bit it. It must have got infected or something because I kept biting it over and over.
"So I had to get that taken out and stitched back up in London."
Ricciardo said he had precious little time to relax after the Shanghai win as he prepared for Sunday's Azerbaijan Grand Prix in Baku.
The Perth-born driver's contract with Red Bull expires at the end of the season and his future has been the subject of frenzied speculation.
He has been linked to a possible move to Ferrari or Mercedes but told reporters on Thursday that he had only spoken to his Red Bull team about his racing future.
(This version of the story was refiled to fix typo in headline)
(Reporting by Greg Stutchbury; Editing by Sudipto Ganguly)
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