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13 Skin Allergy Myths Everyone Needs to Stop Believing

Skin allergies aren't like regular allergies: They turn up unexpectedly and are caused by a lot of weird things. Here's what skin experts want you to know.

Woman in a bathrobe is washing hands.Summer Photographer/Shutterstock

Only a small number of things cause skin allergies

The number of potential skin allergens is endless: People react to soaps, laundry detergents, fabric softeners, shampoos, metals (nickel, cobalt, chromium, and zinc), adhesives, nail polish, topical medications, and plants, according to the American College of Allergy, Asthma and Immunology.

mosquito bites. Close-up of visible red, swollen arm skin from mosquito bites in the summer in the woods. Insect bites. Irritated skin.frank60/Shutterstock

Most rashes are a sign of skin allergies

If your skin comes into contact with nickel in jewelry and you develop red, bumpy, scaly, itchy or swollen skin at the point of contact in a few days, that's most likely a skin allergy. If, however, the reaction happens quickly, you may have irritant dermatitis—which isn't an allergic reaction. "If someone has a skin reaction to something in a matter of hours it is not likely an allergic contact dermatitis, rather an irritant dermatitis," says Adam Friedman, MD, associate professor of dermatology and director of the Supportive Oncodermatology Clinic at George Washington School of Medicine and Health Sciences in Washington, DC. The only exception is hives (officially, contact urticaria), which may occur immediately after contact at the site of contact. When in doubt, check in with your dermatologist or allergist for a definitive explanation. Make sure you know these medical conditions that may be mistaken for allergies.

Close up image of hands with cream tube triocean/Shutterstock

Medical ointments are non-allergenic

Not true: The active ingredients in Neosporin and other ointments can cause skin allergy, says dermatologist Matthew Zirwas, MD, in Bexley, Ohio. "If you have a rash or irritation and use these products, you may feel better initially and then the itchiness or irritation will get worse and worse," he says. Your best bet? See a specialist to make sure you are not doing more harm than good.

Summer holiday, applying sunscreen (suntan) cremeMarko Marcello/Shutterstock

Sunscreen allergies are always caused by the ingredients

Although some people are allergic to sunscreen ingredients, others react to the combination of UV rays hitting the sunscreen. "If you are not in the sun, there's no problem, but if you are out in the sun, you will have a problem," says Dr. Zirwas. Avoid this by choosing and using sunscreens that have titanium oxide and/or zinc oxide and nothing else, he suggests.

Bottles of essential oil with lavender on tableAfrica Studio/Shutterstock

Natural, essential oils are safe for your skin

Essential oils are all the rage, but some—including frankincense, lavender, tea tree, and peppermint—can trigger skin allergies, Dr. Zirwas says. "Once we figure out it's the essential oil and they stop using it, their rash gets better."

Doctor doing skin test to her patient in medical officewavebreakmedia/Shutterstock

Identifying the culprit is easy

Allergists can quickly narrow down the common foods are responsible for almost all food allergies, but skin allergies are much tougher to ID, Dr. Zirwas says. The list of potential offenders is nearly infinite, and skin allergy reactions are delayed as opposed to immediate. "If you are allergic to shrimp or peanuts or other allergens such as cats, dogs, or pollen, you tend to have an immediate reaction, but reactions to skin allergens don't start for 48 hours," he says. "If you are exposed on a Tuesday, for example, the rash may not occur until Thursday or Friday and can last two to three weeks." This involves a lot more backtracking to identify the possible culprits. Don't miss these other weird things you can be allergic to.

Alergy patch test on the back of a young womanNeeila/Shutterstock

Testing for skin allergies is just like testing for regular allergies

For most skin allergies, doctors rely on patch testing so there is no puncturing of the skin. "We place a drop of a suspected allergen on a disc, tape the disc to the person's back for 48 hours, and then we wait four days to see if there is a reaction," Dr. Zirwas explains. Most reactions occur in two days, but some take longer. "We can use anywhere from 40 to 100 of these discs at a time."

Women's feet she was bathing in a a bathtub with happinessTORWAISTUDIO/Shutterstock

Often, switching your shampoos or body wash will help

The preservatives and fragrances in shampoos and body wash are common skin allergy triggers, Dr. Zirwas says. The real issue is that most of the products on the market contain the same ingredients. Common culprits are methylisothiazolinone (a preservative), cocamidopropyl betaine, and decyl glucoside (lathering agents), though those are just a few of the potential troublemakers. "Switching doesn't work, and it's much more difficult to find fragrance-free shampoos and body washes than to find fragrance-free cleansers, laundry detergents, and creams," he says. Find out how to recognize the most common skin irritations.

Set for personal care with deodorants on wooden tableAfrica Studio/Shutterstock

If you don't have skin allergies yet, you're probably safe

Sorry: You could use the same shampoo or soap for decades when all of a sudden you get red, bumpy, scaly, itchy, or swollen skin. "People will say, 'It couldn't be anything I am using because I didn't change anything,' but skin allergies can occur with cumulative exposure," Dr. Zirwas warns. The longer you use a product, the more likely you are to become allergic to it. And once you react, the skin allergy is with you for life. "Each time you are exposed to the allergen, your immune system gets better and better at reacting to it," he says.

Pile of white medical gloves. Heap of thin latex medical gloves isolated on white background. Medicine and health care concept.DenisProduction.com/Shutterstock

Latex skin allergies are a big concern

Latex allergy was once one of the more common types of skin allergy, but times are changing, says Dr. Zirwas. "It is basically nonexistent nowadays as the companies that make medical products have taken most of the latex out," he says. That said, some people may react to another chemical in rubber gloves or products that traditionally used latex, and mistakenly blame it on latex. These are the sneaky signs your allergy medicine isn't working.

12 Red Flags That Someone May Be Spying on Your Computerhurricanehank/Shutterstock

You can be allergic to your cell phone

We swear this isn't a trick to break your cell phone addiction. Electronics that contain metals like nickel or cobalt can cause skin allergy if they touch your ear, hand, or cheek.

Doctor doing skin prick test at her patient in medical officewavebreakmedia/Shutterstock

Any allergist or dermatologist can deal with your skin allergies

Sure many could, but most are generalists: Dermatologists treat a variety of skin issues, like cancer, psoriasis, and eczema; allergists address all types of problems, including potentially life-threatening food and respiratory allergies. Because skin allergies are so tricky, you may want to find a skin allergy specialist near you through the American Contact Dermatitis Society.

Closeup shot of hands applying moisturizer. Beauty woman holding a glass jar of skin cream. Shallow depth of field with focus on moisturizer.Rido/Shutterstock

You can treat skin allergies with shots

Allergy shots are the best fix for seasonal allergies, but there is no such thing as exposure therapy for skin allergy, Dr. Zirwas says. The only "cure" for skin allergy is avoidance. Over-the-counter steroid creams can help the itching and inflammation as can Sarna Original Anti-Itch Lotion and creams made with pramoxine hydrochloride such as CeraVe Itch Relief Moisturizing Cream. Also check out these 8 home remedies for skin rashes.

hand of a lab technician holding blood tube test and background a rack of color tubes with blood samples other patients / laboratory technician holding a blood tube testangellodeco/Shutterstock

There is a skin allergen of the year

Actually, this one is true: In 2017, the "winner" was alkyl glucoside—a plant-based chemical used in a wide range of cosmetics and household products. "The reason there is a new skin allergen of the year each year is because it takes time from when a chemical is introduced for people to start reacting to it since skin allergies are caused by cumulative reactions," Dr. Zirwas says. The American Contact Dermatitis Society lists the skin allergens of the year for the past 20 years. Next, find out the 11 things itchy skin can reveal about your health.

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