Ill health has forced Aung San Suu Kyi to abruptly cancel further campaign travel, her party said on Sunday, just a week before Myanmar by-elections that are seen as a key test of political reforms.

The Nobel laureate, who is running for a seat in parliament in the April 1 polls, was put on a drip and ordered to rest by her personal doctor after falling ill in the town of Myeik in the far south of Myanmar.

But she pressed ahead with a final rally in the remote area on Sunday and was cheered by tens of thousands of people as she urged supporters to vote for her National League for Democracy party, according to an AFP photographer at the scene.