  In the mean-field approximation, we have studied the soliton which is
embedded in a thermal medium within the chiral soliton model. The energy of the
soliton or the baryon mass in the thermal medium has been carefully evaluated,
in which we emphasize that the thermal effective potential in the soliton
energy should be properly treated in order to derive a finite and well-defined
baryon mass out of the thermal background. The result of the baryon mass at
finite temperatures and densities in chiral soliton model are clearly
presented.
