Brazilian President Jair Bolsonaro was taken to a Sao Paulo hospital for tests early Monday after experiencing abdominal discomfort.

It is learnt that Jair Bolsonaro had an intestinal obstruction. He is now in stable condition, said the hospital officials.

Bolsonaro posted a photo of himself on Twitter in the hospital bed, giving a thumbs up. He wrote that more tests will be done for a possible surgery.

Bolsonaro, 66, has experienced a series of medical issues since he was stabbed in the abdomen on the campaign trail in 2018. At the time, the president was operated on by Dr. Antonio Luiz Macedo, whose team is overseeing his treatment in Sao Paulo. Television network Globo reported Macedo himself was on vacation in the Bahamas and awaiting a flight back to Sao Paulo.

The president was admitted to hospital in July for another intestinal obstruction, following days in which he appeared to struggle with speaking at times and said he suffered from hiccups that could go uninterrupted for days. At the time, he didn't require surgery to recover.

Bolsonaro had been on vacation in southern Brazil, and has no public appearances scheduled on Monday.