Causes of urticaria

Exogenous factors include drug-infected foods, such as streptococcal infection or acute urticaria, which can cause red maculopapules on the skin. In addition, it may also be caused by idiopathic factors. once patients show urticaria, they can go to the hospital dermatology department for examination to find out the cause to prevent frequent attacks. The causes of urticaria mainly include exogenous factors, endogenous factors and idiopathic factors.