Tha urticaria, ris an canar gu cumanta cnapan-starra, na staid craiceann air a bheil coltas bruisean reòta, togte, reòta (cuibhlichean) air a 'chraiceann.
Tha pathophysiology urticaria a 'toirt a-steach sgaoileadh histamine agus luchd-meadhanachaidh inflammatory eile bho cheallan mast, a tha nan ceallan dìon a lorgar sa chraiceann agus ann an clòthan eile.
Ann an urticaria geur, tha sgaoileadh histamine agus luchd-meadhanachaidh eile air a bhrosnachadh le ath-bhualadh aileirgeach gu alergen sònraichte, leithid biadh, cungaidh-leigheis, no steigeadh meanbh-bhiastagan.
Bidh seo ag adhbhrachadh gum bi na ceallan mast a 'de-ghràin, a' leigeil a-mach histamine agus eadar-mheadhanairean eile a dh 'adhbhraicheas soithichean fala a bhith a' leaghadh, a 'leantainn gu cruthachadh cuibhlichean.
Ann an urticaria leantainneach, chan eil fios dè a dh 'adhbhraicheas e gu tric, ach thathas den bheachd gu bheil e co-cheangailte ri inneal fèin-dìonach.
Anns a 'chùis seo, bidh an corp a' dèanamh autoantibodies a tha ag amas air an gabhadair IgE àrd-chàirdeas (FcεRI) air ceallan mast, a 'leantainn gu an gnìomhachadh agus an leigeil ma sgaoil de histamine agus eadar-mheadhanairean eile.
Ann an urticaria geur agus leantainneach, bidh sgaoileadh histamine agus luchd-meadhanachaidh eile a 'leantainn gu na comharraidhean sònraichte de itching, deargadh, agus sèid.
Tha làimhseachadh mar as trice a 'toirt a-steach cleachdadh antihistamines gus casg a chuir air buaidhean histamine agus lughdachadh chomharraidhean.
Ann an cùisean dona, faodar cungaidhean eile leithid corticosteroids no omalizumab a chleachdadh gus smachd a chumail air an t-suidheachadh.
Wahlgren CF: Pathophysiology of itching in urticaria and atopic dermatitis. Allergy. 1992, 47 (2 Pt 1): 65-75.
Raap U, Liekenbröcker T, Wieczorek D, Kapp A, Wedi B: [New therapeutic strategies for the different subtypes of urticaria]. Hautarzt. 2004, 55 (4): 361-6.
[Recommendations for the diagnosis and treatment of urticaria in children]. Arch Argent Pediatr. 2021, 119 (2): S54-S66.
Brzoza Z, Grzeszczak W, Rogala B, Trautsolt W, Moczulski D: Possible contribution of chemokine receptor CCR2 and CCR5 polymorphisms in the pathogenesis of chronic spontaneous autoreactive urticaria. Allergol Immunopathol (Madr). , 42 (4): 302-6.
Sweeney TM, Dexter WW: Cholinergic urticaria in a jogger: ruling out exercise-induced anaphylaxis. Phys Sportsmed. 2003, 31 (6): 32-6.
['Àicheadh: meidigeach']
["Tha an làrach-lìn seo air a thoirt seachad airson adhbharan foghlaim agus fiosrachaidh a-mhàin agus chan eil e a' toirt seachad comhairle mheidigeach no seirbheisean proifeiseanta."]
["Cha bu chòir am fiosrachadh a chaidh a thoirt seachad a chleachdadh airson duilgheadas slàinte no galar a dhearbhadh no a làimhseachadh, agus bu chòir dhaibhsan a tha a'sireadh comhairle meidigeach pearsanta co-chomhairle a chumail ri lighiche-sprèidh."]
["Thoiribh fa-near gu bheil an lìon neural a tha a' cruthachadh fhreagairtean do na ceistean, gu sònraichte neo-chruinneasach nuair a thig e gu susbaint àireamhach. Mar eisimpleir, an àireamh de dhaoine a chaidh a dhearbhadh le galar sònraichte."]
["Faigh comhairle an dotair agad no solaraiche slàinte eile a tha airidh air comhairle a thaobh tinneas meidigeach. Na dì-meas comhairle meidigeach proifeiseanta no dàil ann a bhith ga shireadh air sgàth rudeigin a leugh thu air an làrach-lìn seo. Ma tha thu a'smaoineachadh gum faodadh èiginn meidigeach a bhith agad, cuir fòn gu 911 no rachaibh chun t-seòmar èiginn as fhaisge sa bhad. Chan eil dàimh dotair-euslainteach air a chruthachadh leis an làrach-lìn seo no a chleachdadh. Chan eil BioMedLib no a luchd-obrach, no neach sam bith a tha a' cur ris an làrach-lìn seo, a 'dèanamh riochdachaidhean sam bith, fosgailte no a' toirt a-steach, a thaobh an fhiosrachaidh a tha air a thoirt seachad an seo no a chleachdadh."]
['Àicheadh: còraichean']
["Tha Achd Dlighe-sgrìobhaidh na Mìle Bliadhna Didseatach 1998, 17 U.S.C. § 512 (an DMCA) a' toirt ath-chuinge do shealbhadairean dlighe-sgrìobhaidh a tha den bheachd gu bheil stuth a tha a' nochdadh air an eadar-lìon a' briseadh an còraichean fo lagh dlighe-sgrìobhaidh na SA. "]
["Ma tha thu a' creidsinn ann an deagh chreideamh gu bheil susbaint no stuth sam bith a tha ri fhaotainn a thaobh ar làrach-lìn no ar seirbheisean a' briseadh d' dlighe-sgrìobhaidh, faodaidh tu fhèin (no an riochdaire agad) fios a chur thugainn ag iarraidh gun tèid an susbaint no an stuth a thoirt air falbh, no gun tèid cothrom a chur air. "]
["Feumar sanasan a chur ann an sgrìobhadh tro phost-d (faic an roinn 'Contact' airson seòladh puist-d). "]
["Tha an DMCA ag iarraidh gum bi am fiosrachadh a leanas anns an fhios agad mu bhriseadh còraichean-sgrìobhaidh a thathar ag ràdh: (1) tuairisgeul air an obair fo chòraichean-sgrìobhaidh a tha fo chasaid briseadh; (2) tuairisgeul air an t-susbaint a thathar ag ràdh a tha a 'briseadh agus fiosrachadh gu leòr gus leigeil leinn an t-susbaint a lorg; (3) fiosrachadh conaltraidh dhut, a' toirt a-steach do sheòladh, àireamh fòn agus seòladh puist-d; (4) aithris bhuat gu bheil creideas math agad nach eil an t-susbaint san dòigh a tha gearan air a cheadachadh le sealbhadair a 'chòraichean-sgrìobhaidh, no an neach-ionaid aige, no le gnìomh lagha sam bith; "]
['(5) Dearbhadh agaibh, air a shoidhnigeadh fo pheanas mionnachaidh, gu bheil am fiosrachadh san fhiosrachadh ceart agus gu bheil ùghdarras agaibh na còraichean-sgrìobhaidh a thathar ag ràdh a chaidh a bhriseadh a chur an gnìomh; ']
['agus (6) ainm-sgrìobhte corporra no eileagtronaigeach an t-sealbhadair dlighe-sgrìobhaidh no neach a tha ùghdarraichte a bhith ag obair às leth an t-sealbhadair dlighe-sgrìobhaidh. ']
["Ma dh'fhailicheas tu air a' ghearan agad a dheasachadh, faodaidh e dàil a chur air mura cuir thu a-steach am fiosrachadh gu lèir gu h-àrd."]
['Cuir fios thugainn']
['Cuir post-d thugainn le ceist / moladh sam bith.']
What is pathophysiology of urticaria?
Urticaria, commonly known as hives, is a skin condition characterized by the appearance of itchy, raised, red welts (wheals) on the skin.
The pathophysiology of urticaria involves the release of histamine and other inflammatory mediators from mast cells, which are immune cells found in the skin and other tissues.
In acute urticaria, the release of histamine and other mediators is triggered by an allergic reaction to a specific allergen, such as food, medication, or insect sting.
This causes the mast cells to degranulate, releasing histamine and other mediators that cause blood vessels to become leaky, leading to the formation of wheals.
In chronic urticaria, the cause is often unknown, but it is thought to be related to an autoimmune mechanism.
In this case, the body produces autoantibodies that target the high-affinity IgE receptor (FcεRI) on mast cells, leading to their activation and the release of histamine and other mediators.
In both acute and chronic urticaria, the release of histamine and other mediators leads to the characteristic symptoms of itching, redness, and swelling.
Treatment typically involves the use of antihistamines to block the effects of histamine and reduce symptoms.
In severe cases, other medications such as corticosteroids or omalizumab may be used to control the condition.
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