Aung San Suu Kyi's doctor has expressed concerns for her health, after the Burmese opposition leader vomited during a press conference during on the first leg of her European trip.
The former political prisoner had been complaining of fatigue and jet lag since she arrived in Switzerland late on Wednesday night.
She told reporters in Bern she was unused to time change "having stayed in one place for so long" and added that she had found the plane journey west "exhausting and disorientating."
Aung San Suu Kyi was taken ill during the conference
As she spoke it was clear that the conference itself was proving too much for Suu Kyi, who reached for a bag and vomited, before saying "I'm so sorry" and excusing herself.
The 66-year old was in Bern speaking alongside Swiss Foreign Minister Didier Burkhalter. She had travelled by train to the Swiss city, following an address to the UN Labour Organisation in Geneva earlier.
Her doctor told Associated Press last night that Aung San Suu Kyi has experienced similar bouts of ill health before, as she travelled around the country during her election campaign.
Aung San Suu Kyi was forced to vomit into a paper bag after she experienced a sudden bout of nausea
Pyone Moe Ei, one of Suu Kyi's two private doctors, said he was worried her health would suffer on her tightly packed European tour, which sees the 66-year-old visit five countries in 17 days.
"Considering her age, the amount of travel she's doing, the time difference, lack of rest and her extremely tight schedule- it is very worrisome." he told the Associated Press in Yangon.
After resting, Aung San Suu Kyi continued with her visit to Swiss parliament on Friday
After cancelling a dinner in Bern to rest, a member of her party told AFP news agency that she had recovered but suffered from "a little headache." She visited the Swiss parliament on Friday morning, where the 66-year-old known as 'The Lady' was given a standing ovation.
The pro-democracy campaigner remained under house arrest in her native Burma for 24 years as a result of her peaceful resistance against the ruling military junta. She was freed in and was awarded a seat in Parliament in Burma's landmark election in April.
The Burmese opposition leader's arrival in Switzerland marks her first visit to Europe for 24 years, and an important landmark in the evolved political situation in Myanmar.
Aung San Suu Kyi appeared to have made a good recovery on Friday
Before she was taken ill, Dider Burkhalter told her:
"The political reforms that are taking place in your country are raising hopes, not only among the local population, but also throughout the world."
Aung San Suu Kyi was in Bern on Friday. On June 16 she will visit Norway to claim her Nobel Peace Prize
The former political prisoner arrives in Britain on Tuesday, her 67th birthday, and is expected to be reunited with members of her family, including her two grandchildren, whom she has never met.
In an unlikely meeting, the pro-democracy campaigner is also to rendezvous with DJ David Lee Travis, better known as the 'Hairy Cornflake.'
Aung San Suu Kyi has spoken of her love for the broadcaster before, telling The Radio Times that whilst under house arrest, she was a big fan of his BBC's World Service show.
The Burmese opposition leader is also due to be presented with an honorary doctorate from Oxford. She studied at the university and met her husband there, the academic Michael Aris, with whom she had two sons.
For many years she was separated from her family, and when her husband died of cancer in 1999, she was unable to be with him in his final moments, for fears that if she left Burma, she would not be allowed back into the country.
Her 17-day trip will also involve visits to Norway, France and Ireland. Tomorrow Aung San Suu Kyi's will go to Oslo to receive her Nobel Peace Prize, 21 years after she was awarded the distinction.