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Urtica dioica, often known as common nettle, burn nettle, stinging nettle (although not all plants of this species sting) or nettle leaf, or just a nettle or stinger, is a herbaceous perennial flowering plant in the family Urticaceae. Originally native to Europe, much of temperate Asia and western North Africa, [2] it is now found worldwide.
When jellyfish venom, carried by the stinging cells of the animal (nematocysts), comes into contact with the skin, it interacts with various cells and substances in the body. These interactions involve keratinocytes , tissue macrophages , dendritic cells , and mast cells , which are key players in the immune system.
Urticating hairs of a stinging nettle. The most common form of urticating hairs in plants are typified by nettles, which possess sharp-pointed hollow bristles seated on a gland that secretes an acrid fluid. The points of these bristles usually break off in the wound, and the acrid fluid is pressed into it.
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Stinging hairs of Urtica dioica (stinging nettle) A stinging plant or a plant with stinging hairs is a plant with hairs on its leaves or stems that are capable of injecting substances that cause pain or irritation. Other plants, such as opuntias, have hairs or spines that cause mechanical irritation, but do not inject chemicals.
Hives, also known as urticaria, is a kind of skin rash with red and/or flesh-colored, raised, itchy bumps. [1] Hives may burn or sting. [2] The patches of rash may appear on different body parts, [2] with variable duration from minutes to days, and do not leave any long-lasting skin change. [2]