The Manchester City striker visited famed specialist Dr Ramon Cugat in Barcelona this week after struggling to overcome an injury suffered in training last month.
He confirmed the news in a Tweet, saying: “Recovering from an arthroscopy on my knee. Fully motivated to get back soon to the field.”
The Argentine international hasn’t started a game since the 1-0 win against Chelsea on March 4.
He has made just two substitute appearances since then – the defeats to Manchester United and Liverpool this month.
Aguero has suffered swelling of the knee as he has worked on his recovery, prompting City to send the 29-year-old for exploratory surgery to determine the full nature of the problem, which is believed to be meniscus damage.
Arthroscopy has a quicker healing time than other types of surgery, but Aguero could still face up to a month out of action – meaning he would effectively be ruled out for the rest of the season.
With the Premier League title wrapped up and City’s Champions League campaign ended by Liverpool, there is no rush to get the player back on the pitch in the closing weeks of the campaign.
But the striker will be determined to regain full fitness for this summer’s World Cup in Russia.