Acts chiefly upon the genitourinary organs, the anus, and the skin, producing irritation, changing the secretions to an acid, corroding character, and causing a tendency to dissolution of fluids, and destruction of tissues. As Sulphur is to psora and Mercury to the syphilitic poison, so is Thuja to that intermediate condition, designated by Hahnemann as sycosis, its chief characteristic action being the formation of wart-like excrescences upon mucous and cutaneous surfaces, resembling the fig warts and condylomata which characterize the sycotic poison. Characteristic symptoms.