Dr Vijaya Bhaskar Mallela

When hives appear, it is natural to look for a cause. You may suspect something you ate, a medication or a product that came into contact with your skin. But what if the hives keep returning without an identifiable trigger? It could be more than an allergy.

Chronic urticaria is a condition in which hives, swelling or both recur for more than six weeks. One type is chronic spontaneous urticaria (CSU), where symptoms occur without an identifiable external trigger. Unlike an allergic reaction linked to a specific substance, CSU can cause repeated flare-ups without an obvious explanation.

Dr. Vijaya Bhaskar Mallela, Chief Dermatologist, Jubilee Hills, Hyderabad, says, “Recurring hives are commonly linked to allergies, although this may not always be the case. If the symptoms persist for more than six weeks or occur repeatedly without an identifiable trigger, chronic spontaneous urticaria could be a possible explanation. A medical evaluation can help distinguish between different causes and determine the most suitable course of treatment.”

Here are five important things to understand about recurrent hives:

1. Hives do not always indicate an allergy

Hives are raised, itchy welts that can appear suddenly on different parts of the body. While they may occur during an allergic reaction, they are also a common symptom of CSU. Therefore, recurring hives should not automatically be attributed to food, skincare products or environmental exposure.

2. The six-week mark matters

When hives recur for more than six weeks, the condition is considered chronic urticaria. Individual welts often disappear within 24 hours, but new ones may develop elsewhere. Keeping track of their frequency, duration and associated swelling can help during a medical consultation.

3. Finding triggers can be frustrating

People experiencing repeated flare-ups may eliminate certain foods, change skincare products or avoid everyday activities. However, CSU often occurs without a specific external trigger. Certain factors may worsen symptoms, but they are not necessarily the underlying cause.

4. It can affect overall wellbeing

Persistent itching can disturb sleep, cause daytime fatigue and affect concentration at work. Visible hives and swelling may also lead to discomfort or self-consciousness in social situations. The unpredictability of flare-ups can further affect emotional wellbeing and quality of life.

5. The right diagnosis guides treatment

A dermatologist or allergist can assess symptoms, review medical history and determine whether further investigations are needed. Treatment focuses on controlling symptoms and is guided by clinical assessment and response. Unnecessary dietary restrictions or avoiding suspected allergens may not help when no allergic trigger is identified. Recurrent hives deserve attention, particularly when they persist for weeks or return without a clear explanation. Instead of assuming every flare-up is an allergy, seeking medical advice can help identify CSU and ensure appropriatesymptom management.