Dont travel without your travel insurance people. It costs approx 6000 baht for a 1 year cover from an international company within Thailand. This covers you for a trip up to 90 days out of Thailand.

Even your border runs could expose you to a nasty accident within Lao / Singapore / Malaysia.

THE condition of an Australian man who spent 11 days lost in a jungle in Laos has taken a turn for the worse.

Hayden Adcock, 40, suffered hallucinations and was left with multiple health problems after he went missing on a short walk to a waterfall in a national park in the Khammouane province of Laos on July 31.

A helicopter search found him on August 10 and he was airlifted to hospital in Bangkok, Thailand.

His 78-year-old father Stan, who lives at Yandina on Queensland's Sunshine Coast, said his Hong Kong-based nephew Ian Adcock, had called to tell him Hayden's condition had deteriorated last night.

"His condition has gone downhill," Mr Adcock said today.

"Yesterday, it took a turn for the worse.

"He's got some major problems like internal bleeding and he's on dialysis, so his kidneys are failing again and they are talking again about suspected pneumonia - so they are three bad reports."

Hayden had suffered multiple organ failure, including a collapsed lung, during his jungle ordeal.

"Everything is down and it's not looking good but we've still got hope," Mr Adcock said.

Hayden's mother, Lynne Sturrock, had flown to Bangkok to be with her son and further word on his condition was expected later this afternoon.

Mr Adcock said his son was an experienced traveller and bushwalker who had taken 12 months off work with the Australian Tax Office to take a six-month contract teaching English in Hanoi, Vietnam.