urticaria

plural urticarias

1. countableuncountablemedicineItchy, swollen, red areas of the skin which can appear quickly in response to an allergen or other conditions.

   "And the cramps when my body - like a badly articulated skeleton - would all get twisted into one rigid tangle! But now, except some dyspepsia and urticaria of the palms, I am free from pain."

   1925 July – 1926 May, A[rthur] Conan Doyle, “(please specify the chapter number)”, in The Land of Mist (eBook no. 0601351h.html), Australia: Project Gutenberg Australia, published April 2019

   1 more example

   So when I was diagnosed with a fairly difficult-to-treat disease called idiopathic angioedema and chronic urticaria (a fancy way of saying we don’t know why you swell and hey, enjoy the 24/7 hives) six months ago, I wasn't quite sure how to cope.

   2014 January 20, Simona Supekar, “How the Internet Helped Me Cope With My Rare Disease”, in The Atlantic

   Synonyms: hives, nettle-rash