I’ve been searching the literature and is seems Localised Heat Urticaria is a very rare condition. I have the exact same symptoms: local severe itching to the pinpoint exposed area, with redness and slight swelling.
The heat can be from hot water, the sun, leaning against a hot car hood, cooking over a gas stove, or a heater.
I never get it from sweating, eating or drinking hot foods, or food generally having a high core temperature.
Has anyone any insights or links they can share? Im very interested in finding the cause of the condition, and appropriate treatment options.
I very much appreciate any information,