Note the location of your dry, sensitive skin
Do you have an "itch that rashes?"
Ternavskaia-Olga-Alibec/ShutterstockIntense itching is another common symptom of eczema—but that could also be an allergic reaction or irritation from a new beauty product. So, how do you know the difference? "Again, it's important to note the location of the intense itch like the severely dry and sensitive skin," says Dr. Fromowitz. "The biggest indicator is whether the itch develops before or after the presence of a physical rash." Eczema is known as the rash that itches, because you will likely get intense itch that precedes the development of a rash. With contact dermatitis, or other forms of rashes, it is often the opposite: The rash appears before you get itchy.
Check the shape of your blisters or rash
Ana-Maria-Tegzes/ShutterstockDeveloping blisters or peeling skin is uncomfortable and worrisome no matter what the cause. Both eczema in a severe form and dermatitis from poison oak or ivy can blister. (Protect yourself by brushing up on what poison ivy looks like.) The distinction is in the distribution and shape of the blisters, according to Dr. Fromowitz. If you notice these conditions on places like the surface of your arms or legs over a muscle, it's likely caused by a reaction to a plant as opposed to blisters in the folds where eczema lives. "Also, the shape of the blisters will be different," he says. Poison ivy rashes tend to be linear lines, while eczema blisters tend to be round and merge together.
Do you also suffer from asthma or hay fever?
wavebreakmedia/ShutterstockPeople often mistake the red, inflamed skin of eczema for temporary irritation from clothing, grass, or pets—or acne, allergies, psoriasis, and other skin conditions. The difference will be the duration and pattern of the redness and inflammation. Dr. Fromowitz's advice: "Ask yourself, how long has it been there, is this the first time it has ever happened, do you have also a history of asthma and allergies, and has anyone else in the family have something like this?" Eczema is part of what doctors call the atopic triad, along with asthma and hay fever. If you suffer from one of those conditions along with red inflamed skin in the flexural areas, then it's more likely eczema. Also, since the condition is genetic, it's likely you would have had similar symptoms as a child, and it would be a recurring problem. If this is the first time your skin is reacting this way—or it's rare—then it's probably due to an irritation and not eczema.
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Those scaly areas come with other symptoms
Ternavskaia-Olga-Alibec/ShutterstockRemember that scaly patches of skin could come from things like psoriasis or contact dermatitis—or it may just be dry skin due to dry weather or dry air in your home. "If you live in a city with allergens and pollutants or use indoor heating it can simply make your skin dry," says Dr. Fromowitz. Make use of these 10 tips for protecting your skin from dry air. "But, it can also exacerbate eczema if you do have it," he warns. "To know what's eczema, check to see if it's in the folds of your skin, if it's itchy, figure out how often it occurs, and if you also suffer from asthma or hay fever. You have to look at a bigger picture." Don't miss these 10 all-natural psoriasis and eczema treatments.