On the way into caucus this morning, she said the tests for the unspecified health issue had been good and while there was still one thing remaining to deal with "apart from that, it should be great."
She spent her time off "shifting my furniture, getting stuck into the garden, but I also did some economic development, which is shopping."
Ms Collins will face a question from Labour today on her justice portfolio, and NZ First leader Winston Peters has another question for the Prime Minister about Ms Collins.
Mr Peters claimed last week to have information that would get Ms Collins sacked, but that fell flat after it amounted to pointing out she had not declared the accommodation and travel paid for by the Chinese authorities in her return to the Register of Pecuniary Interests.
The rules specify official Parliamentary travel does not have to be disclosed, but that does not appear to cover ministerial travel, and most ministers - including the Prime Minister - do declare it.
Ms Collins said she believed the Opposition would be better off focusing on the big issues "but if they want to spend their time doing that, I can't do much about it."