Every smooth manifold is assumed to be Hausdorff and second-countable.
Let $M$ be a smooth manifold with nonempty boundary.
$\forall p\in \partial M$, does there exist a smooth manifold $N$ with or without boundary such that $M\subset N$ is an embedded submanifold with boundary, $M$ has the same dimension as $N$, and $p$ is an interior point of $N$?