It is a disease that occurs as a result of the leakage of the liquid (plasma) part of the blood from the small vessels in the skin and mucous membranes to the surrounding tissue and progresses with short-term swellings. The disease creates red, itchy, raised rashes on the skin. It can be from 3 mm to 10-20 cm in size. The disease can be located all over the body, most often on the trunk. Attacks occur mostly at night.
Many factors are effective in the formation of urticaria. Opium alcoholides, aspirin, non-steroidal anti-inflammatory drugs, contrast agents, some blood products can cause urticaria. Some foods such as seafood, berries, food additives, and physical agents may cause urticaria. Apart from these, various triggering factors are reported to play a role in the formation of urticaria. Infections (urticaria, throat infections), parasitosis (intestinal parasites, urinary tract parasites). Internal diseases may progress together with urticaria. systemic lupus erythematosus, polyarteritis nodosa, hyperthyroidism, hypoporathyroidism, leukemia, lymphoma, lung, colon and breast cancer. Psychological disorders and stress can cause or exacerbate urticaria.
Urticaria is defined as acute if the symptoms are shorter than 6 weeks, chronic urticaria if it lasts longer than 6 weeks. Angioneurotic edema, (swelling of the face and eyes), physical urticaria (cold-induced, pressure-induced, heat-related, and sun-induced urticaria lesions in contact areas other than the classical type of urticaria). There are also different types such as contact urticaria (urticaria lesions in contact areas as a result of contact with allergens such as chemical agents).