Hives: What it is, Causes, Symptoms, Treatment & More

What are Hives?

Hives are a skin condition that causes raised, itchy welts or patches. These welts can vary in size and shape and may develop anywhere on the body. Hives occur when the body releases histamine and other chemicals into the bloodstream, causing small blood vessels in the skin to leak fluid. Allergies, infections, medications, stress, heat, cold, exercise, and other environmental factors can trigger this condition. 

Most welts go away within 24 hours, but new ones may appear. Hives can be short-term, lasting less than six weeks, or long-term, lasting more than six weeks. Most cases are mild, but if you have a severe reaction, seek medical help right away.

How Common are Hives?

Hives are a common skin problem that can affect anyone. Most cases go away on their own within a few days or weeks. However, about 0.5% to 1% of people get chronic hives, which last more than six weeks. Studies show that 73% of people with chronic hives have chronic spontaneous urticaria (CSU). The same study found that 67% of patients were women, suggesting that hives may be more common in females. Also, about one-third of patients had at least one positive autoantibody, suggesting that an autoimmune mechanism may play a role in many cases.

What are the Symptoms of Hives?

Early symptoms of hives may develop slowly. Some major symptoms include:

• Itchy Skin (Pruritus): Intense itching is the most common symptom of hives and can range from mild to severe.

• Raised Welts (Weals): Raised, swollen bumps or patches may appear suddenly on the skin and vary in size.

• Red or Skin-Coloured Rash: The welts may be red, pink, purple, or skin-coloured, depending on the individual's skin tone.

• Welts that Change Size and Shape: Hives can enlarge, shrink, merge together, or change shape over time.

• Recurrent Appearance and Disappearance: The rash may appear and fade repeatedly, often reappearing in different areas of the body.

• Swelling Beneath the Skin (Angioedema): Some people develop painful swelling around the eyes, lips, cheeks, hands, or feet.

• Burning or Stinging Sensation: Along with itching, hives may cause a burning, tingling, or stinging feeling on the skin.

What Causes Hives?

Listed below are the main causes of hives:

• Allergic Reactions: Exposure to certain foods, medications, insect stings, pollen, or other allergens can trigger hives.

• Infections: Viral, bacterial, or parasitic infections can cause hives by triggering the immune system.

• Emotional or Physical Stress: Stress can bring on hives or make them worse by causing the body to release more inflammatory chemicals.

• Heat Exposure: Hot weather, warm baths, sweating, or a rise in body temperature can trigger hives for some people.

• Cold Exposure: Cold air, cold water, or sudden changes in temperature can cause hives to appear.

• Sunlight Exposure: Some people get hives after being in the sun, which is called solar urticaria.

• Exercise: Physical activity can increase body temperature and sweating, which may trigger hives in susceptible individuals.

• Scratching the Skin: Wearing tight clothes, waistbands, straps, or anything that puts pressure on the skin can lead to hives.

• Underlying Medical Conditions: Certain conditions, including thyroid disease, autoimmune disorders, infections, allergies, and, rarely, cancer, may be associated with hives.

What are the Complications of Hives?

While hives are usually not dangerous, they can sometimes lead to other problems, such as:

• Severe Itching: Ongoing itching can make it hard to sleep, do daily tasks, or enjoy life as usual.

• Anaphylaxis: Rarely, hives can be part of a serious allergic reaction that makes it hard to breathe and needs emergency care.

• Angioedema: Some people get deeper swelling under the skin, often around the eyes, lips, tongue, hands, or feet.

• Sleep Problems: Itching and discomfort can make it hard to fall asleep or stay asleep.

• Emotional Distress: Having hives for a long time can cause stress, anxiety, frustration, and lower self-confidence.

• Reduce Quality of Life: If hives keep coming back, they can get in the way of work, school, spending time with others, and being active.

When Should I See My Healthcare Provider?

You should consult a healthcare provider if your symptoms are persistent, severe, or affecting your daily life. Seek medical attention if you experience any of the following:

• Your hives last longer than a few days.

• Your symptoms keep coming back or become long-lasting.

• You notice swelling around your lips, tongue, face, or throat.

• Experience trouble breathing or swallowing.

• You feel dizzy, lightheaded, or like you might faint.

• The itching gets so bad that it keeps you from sleeping or doing your usual activities.

• You are not sure what is causing your hives or think you might be having an allergic reaction.

• You have hives along with a fever or joint pain or feel generally unwell.

• The rash spreads quickly or covers a large part of your body.

• Your symptoms last for more than six weeks, which may mean you have chronic urticaria.

How are Hives Diagnosed?

Doctors usually diagnose hives through a physical examination and medical history review. This includes:

How are Hives Managed?

The management of hives depends on the type, severity of symptoms, age, and overall health condition. 

• Antihistamines: Antihistamines are usually the first treatment recommended for hives and help reduce itching, redness, and swelling. In some cases, higher doses may be prescribed for better symptom control.

• Trigger Avoidance: Finding and avoiding triggers like certain foods, medications, stress, heat, or cold can help prevent hives from coming back.

• Biologic Therapies: For chronic hives that do not respond to high-dose antihistamines, healthcare providers may recommend biologic medications such as omalizumab (Xolair) or dupilumab (Dupixent), which are given as injections.

• Oral Corticosteroids: Short-term oral corticosteroids can help control severe hives and reduce inflammation. Doctors usually prescribe them only for a short time because of possible side effects.

• Remibrutinib: Remibrutinib (Rhapsody®) is an oral medication that works by blocking the release of histamine and other inflammatory substances that contribute to hives. It may be prescribed when antihistamines are not effective.

• Lifestyle Measures: Wearing loose clothes, not scratching, using cool compresses, and managing stress can help ease symptoms and make you feel more comfortable.

What is the Prognosis for Hives?

Most people with hives have a very good outlook. Acute hives usually go away in a few days or weeks and do not cause long-term problems. Hives can last for months or years, but treatment and avoiding triggers often help keep them under control. Over time, most people see their symptoms improve a lot or go away completely.

Can Hives Be Cured?

Many cases of acute hives resolve completely once the trigger is identified and avoided. Hives may not always have a permanent cure, but symptoms can often be effectively controlled through medications, lifestyle modifications, and regular medical care. In many people, hives eventually go away on their own.

How Can I Prevent Hives?

The various precautionary steps to prevent hives are as follows:

• Try to identify and avoid triggers like certain foods, medications, or allergens.

• Manage your stress, since emotional stress can trigger or make symptoms worse.

• Wear loose-fitting clothes to reduce pressure and friction on your skin.

• Try to avoid extreme temperatures, like too much heat or cold.

• Use gentle, fragrance-free skincare products to help prevent skin irritation.

• Try not to scratch the affected areas, since this can make hives worse or cause new welts.

• Protect your skin from too much sun if sunlight tends to trigger your symptoms.

• Follow your healthcare provider advice when managing allergies or other long-term health conditions.

• Keep a symptom diary to help you spot and avoid possible triggers.

• See your doctor if hives happen often or last for a long time.

Does Health Insurance Cover Hives?

Health insurance will provide coverage for hives treatment only if it is considered medically necessary. If you have a mild case and only need to see a doctor or get medicine, your policy will cover it only if it includes OPD benefits.

If hives cause a severe allergic reaction or complications, or you need to be hospitalised, your insurance may cover the entire treatment cost according to your policy terms and conditions.

How Much Health Insurance Coverage is Needed for Hives Treatment?

For most people, having health insurance coverage of ₹5 lakh to ₹10 lakh is usually enough to manage hives and related medical costs. If you want more protection against allergies, chronic illnesses, or unexpected hospital stays, you might consider a higher coverage of ₹10 lakh to ₹15 lakh for extra peace of mind.