If you simply experience dryness and thirst in your throat, you may first consult an ENT. The most common cause may be inflammation of the throat due to an acute upper respiratory tract infection, which manifests as a dry throat and is a self-limiting condition that usually clears up within a week.
Attention needs to be paid to drinking more water, and thirst caused by acute upper respiratory tract infection can be effectively relieved by drinking water; chronic pharyngitis can be treated symptomatically.