It originates from the Latin word urtica, meaning stinging hair or nettle, as the classical presentation follows the contact with a perennial flowering plant Urtica dioica. The history of urticaria dates back to 1000–2000 BC with its reference as a wind-type concealed rash in the book The Yellow Emperors Inner Classic from Huangdi Neijing. Hippocrates in the 4th century first described urticaria as "knidosis" after the Greek word knido for nettle. The discovery of mast cells by Paul Ehrlich in 1879 brought urticaria and similar conditions under a comprehensive idea of allergic conditions. See also
Urticarial vasculitis
Dermatitis

References
External links

Urticaria photo library at Dermnet
A person with disorganized schizophrenia may also experience behavioral disorganization, which may impair his or her ability to carry out daily activities such as showering or eating.The emotional responses of such people often seem strange or inappropriate. Inappropriate facial responses may be common, and behavior is sometimes described as "silly", such as inappropriate laughter. Sometimes, there is a complete lack of emotion, including anhedonia (lack of pleasure), and avolition (lack of motivation). Some of these features are also present in other types of schizophrenia, but they are most prominent in disorganized schizophrenia. Treatment
This form of schizophrenia is typically associated with early onset (often between the ages of 15 and 25 years) and is thought to have a poor prognosis because of the rapid development of negative symptoms and decline in social functioning.Use of electroconvulsive therapy has been proposed; however, the effectiveness after treatment is in question. See also
Catatonia
Communication deviance
Paranoid schizophrenia

References


== External links ==