Is urticaria caused by an overactive immune system?

Generally, urticaria is not caused by an overly "strong" immune system, but rather by abnormal reactions resulting from immune system dysfunction. If experiencing any discomfort, timely medical consultation is recommended. Detailed explanation is as follows:

The normal function of the human immune system is to identify and eliminate harmful substances. However, in patients with urticaria, the immune system exhibits excessive sensitivity to certain otherwise harmless substances, such as foods, pollen, or temperature changes. It mistakenly identifies these substances as "foreign invaders," thereby activating immune cells to release inflammatory mediators like histamine. This leads to dilation of small blood vessels and increased vascular permeability in the skin and mucous membranes, manifesting as symptoms like wheals and itching.

This condition is essentially caused by immune regulatory imbalance, rather than hyperactive immunity. The "strength" or "weakness" of immunity has no direct correlation with urticaria; even individuals with normal immune function may develop the condition. Clinically, the occurrence of urticaria depends more on the combined effects of individual allergic constitution, genetic factors, and environmental triggers, rather than simply the level of immune function.

Whether acute or chronic urticaria, self-medication should be avoided. Treatment should follow medical guidance to appropriately use antihistamines or other therapeutic approaches. Additionally, maintaining personal hygiene and avoiding known allergens are also important.