Dr. C. Hering. North American Journal of Homoeopathy , Vol. II. Here is also described the preparation of the substance. What is Psorinum ? It is prepared from the contents of the itch vesicle . What are its principal spheres of action ? It acts chiefly upon the lymphatic-glandular system and upon the cerebro-spinal system ; it produces an impoverished condition of the blood and low cachexia. Give its symptoms and application in skin diseases. Herpetic eruptions accompanied by great itching, which becomes intolerable as soon as the patient becomes warm in bed ; the skin has a dirty, greasy look ; the sebaceous glands secrete in excess. Tinea capitis, with oozing of an offensive matter. What are the ear symptoms ? Otorrhoea, with a horribly offensive odor, like that of rotten meat. Give four more characteristic symptoms of Psorinum.