In May 2016, actress Julianna Margulies had to cancel an appearance due to chickenpox, which can indeed affect adults as well as children. Chickenpox, caused by the varicella-zoster virus, is highly contagious, according to the Centers for Disease Control and Prevention (CDC). The illness, which typically lasts for five to seven days, can present as a full-body rash of between 250 and 500 irritating, fluid-filled blisters, in addition to causing issues like fatigue and fever. It’s most common in people under 15, according to the U.S. National Library of Medicine, but if you haven’t gotten the vaccine or never got the virus as a child, you’re still at risk of getting it when you’re older. Along with babies, pregnant people, and people with weakened immune systems due to illness or medication, adults are one of the groups at risk for chickenpox complications like bacterial infections, dehydration, and pneumonia, according to the CDC.
Of course, that doesn’t mean things will absolutely get dire if you contract chickenpox as an adult. But if you have a rash that develops into those telltale blisters, call your doctor. They may prescribe you the antiviral medication Acyclovir to help speed up your body’s healing process, but it works best when taken in the first 24 hours after the rash rears its head, says the CDC. Beyond that, you can relieve some of the irritating symptoms at home with methods like oatmeal baths and calamine lotion to soothe irritation.
Also, FYI, once you’ve had chickenpox, you can’t get it again. But since the varicella-zoster virus stays in your system, you can get shingles. This condition also shows up as a painful rash, typically a strip of blisters on either side of your body. If you suspect you have shingles, call your doctor, who can prescribe an antiviral medication and figure out the best treatment for the pain—since shingles can last for two to four weeks, you'll probably need it.