Doctors don’t know which comes first. But long-lasting inflammation throughout the body is something they have in common.
Fat cells may be able to turn on inflammation. There is also good evidence that the more you weigh, the more severe your psoriasis is, says Benjamin D. Ehst, MD, PhD, assistant professor of dermatology at Oregon Health and Sciences University.
For instance, you could gain weight if being active were painful (which is especially likely if you have psoriatic arthritis) or if you avoided exercise because tight-fitting workout clothes were uncomfortable on your skin.
Likewise, if you were self-conscious about your skin and you often comforted yourself with food, that could lead to extra pounds.
No matter what size you are, there are solutions that can help.
Skin Care Tips
Take extra care to keep any skin folds clean. When you shower, wash with mild soap that's free of perfumes, and use only warm or lukewarm water.
“Hot temperatures wash away your skin's protective oils," says Delphine Lee, MD, PhD, a dermatologist at Providence Saint John’s Health Center in Santa Monica, CA. "You might also try applying powder afterwards to decrease moisture and itchiness."
Do you use skin cream medications for your psoriasis? Remember that skin folds are more moist, “so medicine penetrates more readily," Lee says.
Go easy in those areas with creams that your doctor has prescribed, especially steroids that you put on your skin, “since those can thin your skin over time," Lee says.
Will Weight Loss Help?
But that doesn’t always happen.
“A recent study showed that only 40% of people who had bariatric surgery saw an improvement in their psoriasis,” says Tissa Hata, MD, director of the University of California San Diego dermatology clinical trials unit.
Getting to a healthy weight through diet and exercise may bring some relief.
In one study, obese people who lost an average of 35 pounds had a “small improvement” in their psoriasis,” says Joel Gelfand, MD, associate professor of dermatology and epidemiology at University of Pennsylvania Perelman School of Medicine.
Some psoriasis medicines also work better on people who are in the healthy range for BMI, which means they are not overweight (or underweight).
Although there’s a chance that weight loss won’t clear up your psoriasis for good, it will still be good for your overall health. So it’s a win, either way.
What you eat may affect how much inflammation you have. For instance, saturated fats may cause inflammation, so choose olive oil when you can. It’s also good to eat salmon, tuna, or other fish that are rich in omega-3 fatty acids.
When you make these lifestyle changes, “start small and go slow,” Lee says. “That way, you’re more likely to stick with your new routine.”