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Ice Effects on Shingles

By Heather Gloria ; Updated August 14, 2017

Shingles is the common name for the disease that results from reactivation of the varicella-zoster virus--the same virus that causes chicken pox upon initial exposure--within the roots of spinal or cranial nerves. According to National Institutes of Health dermatologist Stephen E. Straus in the 2008 edition of “Fitzpatrick’s Dermatology in General Medicine,” shingles produces a blistering skin rash, often accompanied by severe burning, stabbing, throbbing or electrical pain. While ice can provide temporary relief from shingles pain, prolonged use can lead to local tissue damage.

Mechanism of Action

In the 2009 edition of “Hazzard’s Geriatric Medicine and Gerontology,” University of Alabama Professor Cynthia J. Brown, M.D., M.S.P.H. explains that cold results in constriction of the blood vessels of the skin, decreased nerve conduction velocity, decreased muscle spasms and short-term pain relief. With prolonged application, blood vessel constriction leads to tissue damage due to a shortage of nutrients and oxygen. Patients can’t detect that this is happening because cold quells the pain that would normally accompany inadequate blood flow.

Application

In the 2009 edition of “Hazzard’s Geriatric Medicine and Gerontology,” National Institute of Aging researcher Shari M. Ling, M.D. describes the safe application of ice to skin affected by pain. According to Ling, patients should limit application to no more than 20 minutes per session, or when skin becomes numb. Patients who experience pain when ice is removed should apply heat immediately because pain is a sign of tissue damage.

Alternatives

As alternatives to ice, says Brown, patients can use cold packs, cold water immersion, cooling massage and vapocoolant sprays. In the January 2008 edition of “Knee Surgery,” Medical University of South Carolina orthopedic surgeon Shane K. Woolf describes a device called a “CryoCuff” that provides continuous, temperature-controlled cold therapy. According to Woolf, patients who used the device for pain due to outpatient knee surgery reported significantly superior pain relief compared to patients who used traditional ice packs.

Complications

Ice causes tissue damage when water and fats within skin freeze. In the 2008 edition of “Fitzpatrick’s Dermatology in General Medicine,” dermatologist Gerald E. Pierard describes the symptoms of cold-induced tissue damage: Superficial frostbite leads to pain, followed by blistering 24 to 36 hours later. White or blue skin and the absence of pain often signals deep frostbite. Deep frostbite blisters are typically more extensive than with superficial frostbite. When blister fluid resorbs, says Pierard, it leaves behind hard, black gangrenous tissue that must be removed surgically.

Contraindications

According to Brown, people with vascular disease, nerve injuries, a history of hypersensitivity to cold or a condition known as Raynaud’s disease should not use ice for shingles or any other condition. These people can develop injuries much more quickly than people without such conditions, and they may not be able to detect when injury has occurred.

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