Thailand's royal palace has announced that 87-year-old King Bhumibol Adulyadej is recovering from several ailments, including excess fluid in the brain and difficult breathing due to congested lungs.

The Royal Household said Monday that a scan performed earlier this year found an increased level of fluid in the king's brain, but others in July and August showed the level had started to decrease.

It said the latest checkup and X-ray showed that an inflammation found earlier in the king's chest had disappeared, his heartbeat was back to normal and his breathing was close to normal.

The king has rarely left a Bangkok hospital that has become his residence since he was admitted in 2009. His general absence from public affairs has spurred concern about the eventual royal succession.