Nettle rash

Nessel,/. nettle unbleached cotton cloth, nettle cloth, -ausschlag, m. nettle rash, -ge-waohse, n.pl. (Bot.) Urticaceae. 

Histamine found in foods which undergo a fermentation process, e.g., blue cheese, beer, sourkraut, and pickles. What is more, tomatoes and strawberries also contain a large amount of this biogenic amine. Both types can induce nettle rash in small children and elderly people. 

Tartazine (yellow pigment), on the other hand, may cause typical histamine poisoning symptoms, such as reduced blood pressure, increased heart rate, skin hyperemia, itching, nettle rash, and runny nasal discharge. The symptoms occur due to degranulation of a large number of mastocytes as a result of ion imbalance, such as tartazine chelates zinc ions. 

Aspartame (a low calories sweetener) can also trigger urticaria (nettle rash), itchy hives, and swelling of the body (Bosso and Simon 2008). 

Histamine, acting at the Hi receptor, is mainly known for producing allergic responses, for example hay fever and skin reactions, such as urticaria ( nettle rash ). Antagonists of this receptor, which suppress these actions of histamine, are well known to the layman, under the loose description anti-histamines , as hay fever remedies. 

Case reports indicate that horses exposed to stinging nettle leaf sometimes become distressed and develop ataxia and muscle weakness. Such incidents of stinging nettle exposure are often accompanied by the characteristic nettle rash (Bathe 1994 Conwell and Findlay 2008). 

It is clear that histamine is not the only mediator of an allergic reaction, but it is unquestionable that this alkaloid plays a very important role in the reaction. That is why an antihistaminic agent is active against the expansion of capillary vessels and the contraction of bronchi. Clinically it is used for nettle rash and allergic inflammation of the nose. On the other hand, an antihistaminic agent cannot suppress bronchial spasms or the secretion of gastric juice. These phenomena are explained in that a different compound exhibits the same biological activity as histamine, and because of the different receptors of histamine. 

Allergy a hypersensitivity of the immune apparatus s pathological immune reaction induced either by antibodies (immediate hypersensitivity) or by lymphoid cells (delayed type A.). Unlike the delayed type, immediate hypersensitivity can be passively transmitted in the serum. Symptoms of immediate hy-peisensitivity begin shortly after contact and decay rapidly, but delayed type symptoms do not attain a maximum for 24-48 hours then decline slowly over days or weeks Examples of immediate type A. are anaphylaxis the Arthus reaction and serum sickness. The best known A., anaphylaxia, can occur as a local (cutaneous) reaction (e.g. a rash with blisters) or as a systemic reaction (anaphylactic shock). Asthma, hay fever and nettle rashes are also examples of local anaphylactic reactions which are induced by reagins (see Immunoglobulins IgE). Only primates can be sensitized by injection with human reagins. An example of delayed type A. is the tuberculin reaction, which is based on a cellular immune response. 

Cupressus spedes Of 547 patients with respiratory symptoms (wheezing cough, rhinitis, asthma), cutaneous (eczema, nettle rash, angioedema) or conjunctivitis, 73 were allergic to cypress pollen, three of whom had a single allergy [49 ]. 

ITCHING, HIVES, NETTLE-RASH NASAL DISCHARGES SUBSTANCE (SRS) HOgjNQ... 

Allergic reactions may be trivial and local, e.g., a mild nettle-rash or hives (urticaria), or they may be general and so serious as to result in sudden death. Serious reactions are known as anaphylactic shock. Anaphylaxis can be caused by drugs (penicillin and others), horse serum, insect stings, foods (shellfish, nuts, eggs), pollen extracts, and various other agents. 

Immediate and delayed hypersensitivity to stinging nettle leaf was reported in a boy who fell into a stinging nettle patch. Urticaria was present for 12 hours, and a fine vesicular rash erupted at 48 hours (Edwards 1992). A case of severe tongue edema was reported in a woman who placed a fresh leaf of dwarf stinging nettle (U. urens) on her tongue (Caliskaner et al. 2004). 

Irritant reactions range from a mild to severe urticaria, e.g., the rash from nettles (Urtica spp.), to... 

---