What disease is red a knot to rise suddenly on the body to cause

A sudden onset of red pimples on the body is mostly caused by urticaria. Urticaria, also known as wind pimples, is a localized edema reaction due to the expansion of small blood vessels and increased permeability of the skin and mucous membranes. It usually subsides within 24 hours, but it is easy to recur. If the course of disease exceeds six weeks, it is called chronic urticaria, which is more common clinically. Urticaria is generally caused by allergies, including food and respiratory allergies. If the symptoms are mild, no treatment is required. If the symptoms are severe, such as dyspnea, nausea, vomiting, abdominal pain, diarrhea, oral olopatadine hydrochloride or other antihistamines may be used. Oral or topical hormone therapy may be used if necessary.