Can hives cause fever?

Urticaria is a relatively common skin disease. Due to its strong symptoms and indirect occurrence from time to time, the onset of the disease is very fast, but sometimes it is relatively slow. In addition to the symptoms of fever all over the body, urticaria also has local wheal-like rashes of varying sizes on the patient's skin. The skin is uneven and accompanied by redness and swelling. The patient may also experience symptoms of irritability, nausea and vomiting.

Urticaria generally manifests as severe itching of the skin, followed by the appearance of red wheals of varying sizes all over the body. When the wheal grows larger (up to 20 cm), the rash may fade to form a ring in its center. Urticaria wheals may appear and disappear suddenly, appearing in one place and disappearing a few hours later, then appearing somewhere else and disappearing on their own without leaving any trace. There are also some common accompanying symptoms such as abdominal pain, headache, shortness of breath, nausea, etc. When there is angioedema, the laryngeal mucosa and airway may sometimes be affected, causing difficulty breathing.

1. Acute urticaria

The onset is acute, with wheal-like lesions of varying sizes appearing on the skin. They occur suddenly and disappear quickly, with severe itching, and no traces left after healing. When serum exudes rapidly in the microvessels, it compresses the walls of the vessels, causing the wheals to appear pale and the skin to become uneven and appear like orange peel.

The edema subsided within a few hours, and wheals continued to occur one after another. Severe cases may be accompanied by allergic symptoms such as palpitations, irritability, nausea, vomiting, and even low blood pressure. Some people may experience abdominal pain due to gastrointestinal mucosal edema, which may be similar to acute abdomen when severe.

When the trachea and laryngeal mucosa are edematous, breathing difficulties and even suffocation may occur. If accompanied by symptoms of systemic poisoning such as high fever, chills, and rapid pulse, special attention should be paid to the possibility of serious infection such as sepsis.

2. Chronic urticaria

Wheal lesions recur repeatedly and last for more than 1 to 3 months. Some are time-dependent, such as getting worse in the morning or before going to bed, while others have no definite regularity. In most patients, no cause can be found.