Vipera – periphlebitis (inflammation around veins)
Rana bufo – localized lymphangitis (inflammation around lymph channels)
Aesculus hippocastanum – hemorrhoids
Apis – edematous reactions
Hahnemann considered Psora to be the most common of the three chronic diseases. He felt that it was due to scabies, a term which at that time included not only scabies due to the insect but also various skin disorders characterized by oozing, scaliness, and a particular type of severe itching (pruritis) aggravated by water and the warmth of the bed, and improved by the cold.
The main indicator of the psoric patient is a poor response to apparently correct homeopathic remedies. This makes it a scapegoat for misdiagnosing, however. Other features that are important are periodicity of outbreaks, relief with nervous behavior, tendency to parasites, and a long recovery following illness.
Sulfur, Arsenicum album, Calcarea carbonica, Lycopodium, and Psorinum are the most effective psoric remedies.