German backpacker Carolina Wilga discharged after five nights in Perth hospital

German backpacker Carolina Wilga has been discharged from Perth's Fiona Stanley Hospital after spending five nights recovering from her outback ordeal.

Police said on Saturday she was exhausted, dehydrated, suffering from sunburn and had an injured foot.

She also endured sub-zero temperatures and was "ravaged' by mosquito bites while missing, according to police.

In a social media post from hospital on Monday night, Ms Wilga said she had lost 12 kilograms in that time.

The backpacker was missing for 11 nights in WA's remote outback, north of the Wheatbelt town of Beacon more than 300 kilometres north-east of Perth.

After an extensive air and land search, she was found on the edge of Karroun Hill Nature Reserve in WA's remote Wheatbelt region by a local farmer.

The tourist was located barefoot 36 kilometres from her van, which she abandoned after it became bogged.

After she was found on Friday evening, Ms Wilga was airlifted to Perth on a police plane, where she was taken to hospital via ambulance.

Ms Wilga later released a statement saying she had hit her head after she lost control of her vehicle and it rolled down a slope in the reserve.

In it, she expressed her gratitude for all involved in the search and her recovery.

"Especially to the police investigators, searchers, the German Consulate, the medical staff and the wonderful nurses who took care of me with so much compassion," she said.

"I am simply beyond grateful to have survived."

The ABC confirmed Ms Wilga left hospital on Wednesday afternoon.