  In this paper, we consider the asymptotic profiles of zero points for the
spatial variable of the solutions to the heat equation. By giving suitable
conditions for the initial data, we prove the existence of zero points by
extending the high-order asymptotic expansion theory for the heat equation.
This reveals a previously unknown asymptotic profile of zero points diverging
at $O(t)$. In a one-dimensional spatial case, we show the zero point's second
and third-order asymptotic profiles in a general situation. We also analyze a
zero-level set in high-dimensional spaces and obtain results that extend the
results for the one-dimensional spatial case.
