Shingles vs. Hives: Comparison | Symptoms | Causes and triggers | Diagnosis | Treatment options | Prevention | When to see a doctor | FAQ

Key Takeaways

Shingles, or Herpes zoster, is a viral disease caused by the reactivation of the varicella-zoster virus, which also causes chickenpox. Chickenpox occurs in children, while shingles typically affects adults or the elderly. In shingles the virus attack one or more of your sensory nerves which provide sensation of your skin.

Hives or urticaria is a allergic reaction that may occur in isolation or associated with angio-oedema means swelling that affects the deeper layers of the skin which can affect any part of body.

Even though hives and shingles may look alike, typical location, appearance of the rash, associated symptoms help to differentiate these two conditions. It is important to identify these conditions accurately because severe allergic reaction like anaphylaxis can initially present with hives.

Shingles vs. Hives: Comparison

Symptoms

Shingles (herpes zoster) symptoms

The common presentation of shingles is a rash that involves one side of the body, most commonly on the torso. But It can affect any part of body.

In the early phase of disease you may experience following symptoms before the appearance of  the rash

• Pain
• Tingling sensation
• Itching
• Headache
• Muscle pain
• Body weakness
• Uncommonly fever

After this period, the rash appears as reddish, patchy bumps or raised welts, typically confined to areas of skin supplied by sensory nerves, called dermatomes.

Early-stage shingles presenting as a reddish patchy rash with raised bumps on one side of the torso, helping differentiate it from hives.

Then these raised welts become small blisters which usually scab over within 7-10 days and heal within 2-4 weeks. Complete healing of rash require up to a month.

Next stage of shingles: Raised reddish rash develops small blisters, which typically scab over within days.

Hives (urticaria) symptoms

• Raised, well-circumscribed areas of swelling, often referred to as wheals.
• Accompanied by redness, and in some cases, swelling that may involve deeper layers of the skin.
• Lesions are commonly very itchy and may cause burning or stinging sensations.
• Can appear anywhere on the body and may vary in size and shape.
• Individual lesions often resolve within minutes to hours, but new ones may appear in different locations.
• Triggers include medications, infections, heat, cold, pressure, or external irritants, which cause the release of histamine, leading to local inflammation.

Scratch-like red lines and red patches on the trunk, characteristic of urticaria (hives) with transient lesions

Causes and triggers

Shingles causes:

Shingles is caused by reactivation of varicella zoster virus. After an episode of chickenpox, the virus remains dormant in your nervous system. Years later, it can reactivate when your immune system weakens. Shingles is most commonly affected to adults.

Following are the possible triggering factors for shingles :

• Cancer or ongoing chemotherapy or radiotherapy
• Immunosuppressive medications (steroids)
• Concurrent illnesses
• Stress
• Immunosuppressive state

Hives causes:

Hives result from an immune response to a particular precipitating factor. Exposure to a foreign substance activates white blood cells, which release chemicals that cause hives.

History of previous hives is an important factor.

Precipitating factors:

• Recent illness
• Medication use
• IV radiocontrast media
• Travel
• Foods
• New perfumes, hair dyes, detergents, lotions, creams, or clothes
• Exposure to new pets (dander), dust, mold, chemicals, or plants
• Pregnancy (usually occurs in last trimester and typically resolves spontaneously soon after delivery)
• Contact with nickel, rubber, latex, industrial chemicals, and nail polish
• Sun or cold exposure
• Exercise
• Alcohol ingestion

Diagnosis

A doctor can diagnose these conditions by taking your medical history and performing a physical examination, which helps differentiate between them. Additional tests like blood tests  may required in specific situations like in immunocompromised patients to confirm the diagnosis.

For hives, allergy skin tests and IgE antibody quantification may be used.

 For Shingles fluid inside blisters can be also used to make a diagnosis.

What are the treatment options available for shingles and hives ?

Shingles

An episode of shingles is generally self-limited and resolves without intervention. But there are some specific situations where you may need medications to cure the disease condition.

• Severe symptoms
• A weak immune system
• A rash involving other than your torso
• A rash co-associated with a bacterial infection

Antiviral medications (e.g., acyclovir, valacyclovir) can be given orally. In severe cases it can be given intravenously as well. Antiviral therapy can reduce the duration of new blister formation, speed up scabbing, and alleviate acute discomfort.

Pain management strategies are :

• Nonsteroidal anti-inflammatory drugs (NSAIDs)
• Opioids (tramadol)

Lotions like calamine and wet dressing with Burrow solution are also considered as conservative therapy.

Need of medications will be decided by your clinician.

Hives

The primary treatment for hives is avoiding further exposure to known triggers.

Other treatment options are

• Antihistamines (fexofenadine, loratadine, desloratadine, cetirizine, and levocetirizine) – 1^st line therapy
• Steroids
• Methanol creams

Anaphylaxis is a severe allergic reaction which involve multiple systems in your body. It is a medical emergency that needs immediate hospital admission.

Symptoms of Anaphylaxis include :

• Swelling of your throat, tongue, or mouth
• Fast breathing or difficulty in breathing or wheezing
• Throat tightness
• Grey or bluish colour lips, tongue, or palms
• Swallowing difficulty

Adrenaline or epinephrine is the treatment of choice for anaphylaxis. Epinephrine should be administered intramuscularly.

Prevention

Prevention is better than cure. Following are the preventive strategies for both shingles and hives.

Shingles

Live attenuated varicella vaccine has led to a remarkable reduction in the incidence of chickenpox. Vaccine should be considered in older patients because shingles is more common and is associated with complications. With the age ,there is a decline in the function of immune system. So older population is at risk of getting shingles.

Available Vaccine is

• Shingrix for adults – two doses are recommended for adults over age of 50 and those are with a weakened immune system.

The Centres for Disease Control and Prevention (CDC) recommends administration of varicella-zoster immune globulin which boost your immunity to prevent occurrence of illness following  exposure to chickenpox or shingles if you have a weak immunity.

Hives

You should avoid any medication, food, or other allergen that has precipitated hives or other serious allergic reaction previously.

For solar urticaria as a protective measure sunscreen can be used.

When to see a doctor

The American Academy of Dermatology Association (AAD) recommends seeing a dermatologist within 3 days of developing shingles because early treatments help to reduce symptoms, duration and severity of disease condition. It’s important to get prompt medical attention if you develop shingles in a sensitive area like your genitalia or face or when there is non truncal involvement.

For hives, it’s essential to see a doctor if:

• Hives persist for more than 6 weeks (chronic hives).
• Symptoms significantly impact your quality of life or sleep.
• You experience signs of angioedema (swelling of the deeper skin layers) or symptoms of anaphylaxis, such as:
  • Swelling of the throat, tongue, or mouth.
  • Difficulty breathing or wheezing.
  • Rapid onset of widespread swelling or rash.

Anaphylaxis is a medical emergency and requires immediate hospital care.

Frequently Asked Questions

Here are some frequently asked questions about shingles and hives.

Are hives contagious?

Hives are not contagious unless the swollen areas are infected.

Can shingles cause scarring of skin when it heals?

Scarring can occur if deeper layers of skin are damaged by the rash, a secondary infection, or other complications.

How long do hives last?

• Acute hives – last less than 6 weeks,often resolving within hours or days.
• Chronic hives – Persist more than 6 weeks and may recur over months or years.

Can you get shingles more than once?

Yes, while uncommon. You can have more than one episode of shingles.