Urticaria is a kind of allergic skin disease with skin disease with skin wheals as the main manifestation.
The clinical manifestations are the appearance of wheals over the skin with sudden onset, most of them are red & only few are pale.
Their shapes vary, but the borders clear.
They may attack throughout the body or may be restricted to the face, neck or limbs.
They may rise one after another and have frequent recurrences.
After the recovery there will not be any trace left.
There is serious itching, a burning and heat sensation. Dermatographic test is positive. The wheal may be caused by mechanical stimulation.
The attack can be produced by exposure to cold, sunlight or due to psychic disturbance and intake of protein food, etc.