Younger Adults With Eczema Face Surprisingly High Shingles Risk
For millions of adults living with eczema, the daily struggle involves cracked skin, relentless itching, and a medicine cabinet full of creams and prescriptions. Now, a large study points to another health risk worth watching: shingles. Adults with eczema were 28% more likely to develop the condition, and the link barely budged even after accounting for steroid and immune-suppressing drugs known to raise shingles risk on their own.
Researchers analyzed health records from more than 13.4 million people in England, and the study was published in the journal JDDG: Journal der Deutschen Dermatologischen Gesellschaft. The study is observational, meaning it cannot prove eczema itself causes shingles, but the connection held up after researchers ruled out a long list of other possible explanations.
Shingles is a painful viral illness caused by the same virus responsible for chickenpox. After someone recovers from chickenpox, the virus goes dormant in the nervous system and can reactivate years or decades later, producing a burning, blistering rash, typically on one side of the body. It tends to strike older adults and people with weakened immune systems, and it can cause lasting nerve pain long after the rash clears.
One of the Largest Studies on Eczema and Shingles Risk
Drawing on a database of routinely collected records from primary care doctors across England, the research team followed participants from 1997 through 2023. The study included more than 14 million observations from 13.4 million people. About 2.4 million observations were recorded while participants were in the eczema group, compared with 11.6 million in the matched comparison group. Each person with eczema was matched to up to five similar people without it, based on age, sex, and medical practice.
Over the course of the study, 329,821 shingles cases were recorded in total: 76,990 in people with eczema and 252,831 in the comparison group. Even before accounting for other health and lifestyle factors, people with eczema developed shingles at a higher rate than those without it, and that gap barely moved after researchers factored in age, smoking, alcohol use, obesity, and conditions like diabetes, depression, and heart disease.
Severity Made a Big Difference in Shingles Risk
Not all eczema is created equal, and the study found that worse eczema tracked with greater shingles risk. Researchers didn’t use a clinical severity scale, but instead judged severity by which treatments a patient had been prescribed. Mild eczema carried a 22% higher shingles risk, moderate eczema a 28% elevated risk, and the severe group, defined by patients who needed the strongest immune-suppressing drugs or phototherapy, had more than double the risk of people without eczema. That last number comes with an asterisk: since severe eczema and its treatment are so tightly bundled, the researchers say it’s genuinely hard to tell how much of the extra risk comes from the disease itself versus the drugs used to control it.
A Surprising Pattern in Younger Adults
Shingles is generally thought of as a condition of older age, and risk does increase with age across the board. This study, however, turned up an unexpected pattern: the connection between eczema and shingles was actually stronger in younger adults.
Adults aged 30 to 40 with eczema had a 51% higher risk of shingles than comparable peers without eczema. Those aged 40 to 50 showed a 42% elevation. The relative difference in risk was smaller among people over 50.
Researchers offered a few possible explanations. Adults over 70 in the UK have been eligible for shingles vaccination since 2013, which may have reduced the apparent risk in older age groups. It is also possible that eczema patients who developed shingles at a younger age were no longer in the pool when older age groups were analyzed, effectively underrepresenting the true risk at advanced ages.
Part of what makes this research timely is the growing use of a newer class of drugs called JAK inhibitors to treat moderate to severe eczema. These medications, introduced into UK clinical practice at the end of 2022, already carry a known risk of shingles as a side effect. Because most of this study’s data predates their widespread use, their direct influence on the results is likely negligible. The authors note, though, that eczema patients who go on to take JAK inhibitors may be especially vulnerable to shingles, given the elevated baseline risk the condition already appears to carry.
Source : https://studyfinds.com/eczema-higher-shingles-risk/