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    Shingles

    Herpes zoster

    Shingles (herpes zoster) is a painful, blistering skin rash. It is caused by the varicella-zoster virus. This isthe virus that also causes chickenpox.

    Causes

    After you get chickenpox, the virus remains inactive (becomes dormant) in certain nerves in the body. Shingles occurs after the virus becomes active again in these nerves after many years.

    The reason the virus suddenly becomes active again is not clear. Often only one attack occurs.

    Shinglescan develop in any age group. You are more likely to develop the condition if:

    • You are older than 60
    • You had chickenpox before age 1
    • Your immune system is weakened by medications or disease

    If an adult or child has direct contact with the shingles rash and did not have chickenpox as a child orthe chickenpox vaccine, they can develop chickenpox, not shingles.

    Symptoms

    The first symptom is usually pain, tingling, or burning that occurs on one side of the body. The pain and burning may be severe andare usually present before any rash appears.

    Red patches on the skin, followed by small blisters, form in most people:

    • The blisters break, forming smallsores that begin to dry and form crusts. The crusts fall off in 2 to 3 weeks. Scarring is rare.
    • The rash usually involves a narrow area from the spine around to the front of the abdomen or chest.
    • The rash may involve theface, eyes, mouth, and ears.

    Other symptoms may include:

    • Fever and chills
    • General ill feeling
    • Headache
    • Joint pain
    • Swollen glands (lymph nodes)

    You may also have pain, muscle weakness, and a rash involving different parts of your face if shingles affects a nerve in your face. The symptoms may include:

    • Difficulty moving some of the muscles in the face
    • Drooping eyelid (ptosis)
    • Hearing loss
    • Loss of eye motion
    • Taste problems
    • Vision problems

    Exams and Tests

    Your health care provider can make the diagnosis by looking at your skin and asking about your medical history.

    Tests are rarely needed, but may include taking a skin sample to see if the skin is infected with the virus.

    Blood tests may show an increase in white blood cells and antibodies to the chickenpox virus. But the testscannot confirm that the rash is due to shingles.

    Treatment

    Yourhealth care providermay prescribe a medicine that fights the virus, called an antiviral drug. This drug helps reduce pain, prevent complications, and shorten the course of the disease.

    The medicines should be started within72 hours ofwhen you first feelpain or burning. It is best to start taking them before the blisters appear. Themedicines are usually given in pill form. Some people may need to receive the medicine through a vein (by IV).

    Strong anti-inflammatory medicines called corticosteroids, such as prednisone, may be used to reduce swelling and pain. These medicines do not work in all patients.

    Other medicines may include:

    • Antihistamines to reduce itching (taken by mouth or applied to the skin)
    • Pain medicines
    • Zostrix, a cream containing capsaicin (an extract of pepper) to reduce pain

    Follow your health care provider's instructions about how to care for yourself at home.

    Other measures may include:

    • Caring for your skin by applying cool, wet compresses to reduce pain, and taking soothing baths.
    • Resting in bed until the fever goes down

    Stay away from people whileyour sores are oozing to avoid infecting those who have never had chickenpox -- especially pregnant women.

    Outlook (Prognosis)

    Herpes zoster usually clears in 2 to 3 weeks and rarely returns. If the virus affects the nerves that control movement (the motor nerves), you may have temporary or permanent weakness or paralysis.

    Sometimes the pain in the area where the shingles occurred may last from months to years. This pain is called postherpetic neuralgia.

    It occurs when the nerves have been damaged after an outbreak of shingles. Pain ranges from mild to very severe. Postherpetic neuralgia is more likely to occur in persons over age 60.

    Complications may include:

    • Another attack of shingles
    • Bacterial skin infections
    • Blindness (if shingles occurs in the eye)
    • Deafness
    • Infection, including encephalitis of sepsis (blood infection) in persons with a weakened immune system
    • Ramsay Hunt syndrome if shingles affects the nerves of the face/ear

    When to Contact a Medical Professional

    Call your health care provider if you have symptoms of shingles, particularly if you have a weakened immune system or if your symptoms persist or worsen. Shingles that affects the eye may lead to permanent blindness if you do not receive emergency medical care.

    Prevention

    Do not touch the rash and blisters on persons with shingles or chickenpox if you have never had chickenpox or the chickenpox vaccine.

    A herpes zoster vaccine is available. It is different than the chickenpox vaccine. Older adults who receive the herpes zoster vaccine are less likely to have complications from shingles.

    References

    Cohen J. Varicella-zoster virus (chickenpox, shingles). In: Goldman L, Schafer AI, eds. Goldman’s Cecil Medicine. 24th ed. Philadelphia, Pa.: Elsevier Saunders; 2011:chap 383.

    Habif TP.Clinical Dermatology. 5th ed. St. Louis, MO: Elsevier Mosby; 2009:chap 12.

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    • Adult dermatome

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    • Shingles

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      • Adult dermatome

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      A Closer Look

      Self Care

      Review Date: 6/6/2013

      Reviewed By: Jatin M. Vyas, MD, PhD, Assistant Professor in Medicine, Harvard Medical School; Assistant in Medicine, Division of Infectious Disease, Department of Medicine, Massachusetts General Hospital. Also reviewed by David Zieve, MD, MHA, Bethanne Black, and the A.D.A.M. Editorial team.

      The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.
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