Hives, medically known as urticaria, are red, itchy, raised bumps on the skin that can appear anywhere on the body. They often last less than 12 hours in one area but may persist longer. Understanding the causes of hives is essential for effective management and treatment. Dr. Eliason explains that infections do not directly cause hives; rather, the body’s response to the infection can inadvertently trigger them. This reaction is akin to a mistake made by the body while clearing out an infection, leading to the incidental creation of hives.

Several factors can cause hives. Allergic reactions to foods or medicines are common triggers. For instance, the University of Utah Health emphasizes that both short-term and persistent hives could be linked to allergies. Moreover, insect and non-insect causes, as discussed by the University of Kentucky Entomology, also play a role in hives’ formation.

The appearance of bites or welts can provide clues, though such symptoms are hard to diagnose. In some cases, the location of the rash or irritation hints at the cause, like exposure to certain compounds or materials in workplaces. Hives are characterized by itchy, red rash and swelling over most of the body, and can also be accompanied by symptoms like feeling warm, swelling of the throat and tongue, difficulty breathing, dizziness, headache, and stomach cramps.

Tinea infection, a fungal infection of the skin, sometimes known as ringworm, can also cause skin irritations. According to the University of Rochester Medical, tinea can affect any body part and presents as red patches in ring shapes, though it’s not caused by worms.

Hives can be a manifestation of various conditions, including infections, allergies, and immune system reactions. The Harvard Health and the Children’s Hospital of Philadelphia both provide comprehensive information on hives, emphasizing that they do not leave permanent marks and are a common condition.

For those seeking relief from allergy symptoms, including hives, over-the-counter or prescription medicines can offer significant relief. Understanding the underlying cause is crucial for effective treatment and preventing recurrence.