  Knowledge of the screening masses at finite chemical potential can provide
insight into the nature of the QCD phase diagram. However, lattice studies at
finite chemical potential suffer from the well-known issue of the sign problem,
which has made the calculation of observables such as screening correlators and
screening masses at finite chemical potential quite challenging. One way to
proceed is by expanding the observable in a Taylor series in the chemical
potential and hence calculating the finite-density corrections to the
observable. In this talk, we will use this approach to calculate the screening
mass of the pseudoscalar meson at finite temperatures and chemical potential by
expanding the screening correlator in a Taylor series in the chemical
potential. We will present our results for the second derivative of the
screening mass w.r.t. the chemical potential. Our calculation was done on $64^3
\times 8$ lattices generated using the (2+1) HISQ/tree action.
