Mazzarri was speaking after defeat to Juventus.
"The thing about possibly taking a sabbatical was not a joke. I haven't had a break in 12 years," Mazzarri told Mediaset Premium.
"There's a lot of stress and out of a sense of fairness last year, when I was offered an extended contract, I refused.
"I will confirm what I said, which is I want to reach the end of the season and then reflect on whether or not to go forward.
"It is also a matter of my personal health and well-being. It could well happen, but I'll think about that later on, as right now I am concentrated on the next match against Chievo."