“If your over-the-counter products aren’t working, you’re suffering from a rash for a week or so, and it’s not improving, you should touch base with a board-certified dermatologist,” Dr. Zeichner says, while inside-out ones “can lead to red, angry rashes throughout the entire body.” The next clues to look for are the shape, color, and texture of the rash. “Something that’s localized with distinct borders will typically be an outside-in job,” Dr. Size and location are the first things to consider when trying to identify a rash. How to identify common skin rashes and their symptoms “Our bodies are genetically programmed to work a certain way, and while we can keep symptoms under control, we don’t necessarily have a permanent cure,” Dr. Many of these rashes can be resolved with proper treatment, except in the case of inside-out rashes caused by genetics. And viral infections, like coronavirus, can also result in rashes. Allergic rashes, like a drug rash, occur when you ingest an allergen, including certain foods, such as peanut allergies, or medications. Genetic rashes, like eczema or psoriasis, appear because your skin or immune system is triggered to produce them. Inside-out rashes stem from genetics, allergies, or infections. Meanwhile, organisms living on the skin can cause conditions like ringworm and scabies. Irritants (substances like household cleaners and chemicals that can affect anyone) and allergens (substances like latex and poison ivy that only affect those with specific allergies) can both trigger rashes such as contact dermatitis. Outside-in rashes, like contact dermatitis and ringworm, are due to direct exposure to an outside irritant, allergen, or organism. A few distinct features make their identification and treatment unique. When it comes to the root causes of rashes, they tend to fall into two main categories: outside-in and inside-out, explains Dr. (Note: Some of the chronic skin conditions listed below, like acne and rosacea, might not be considered rashes by all dermatologists, but their symptoms and treatments are similar enough to other rashes to include them in this list.) What causes skin rashes? That inflammation could be minor or could greatly impact the color, texture, or feeling of your skin-it all depends on the type and severity of your rash. The unifying feature of all rashes is inflammation, Dr. Basically, a rash is your skin’s way of telling you something is up, whether you’ve been exposed to an irritant or you have an underlying medical condition. “A rash is essentially inflammation in the skin that can be caused by either an external exposure or an internal factor,” says Joshua Zeichner, M.D., director of cosmetic and clinical research in dermatology at Mount Sinai Hospital in New York City. Once you can identify the cause of your rash, it’s much easier to know the right way to treat it. Skin rashes are a common issue that can impact pretty much anyone, no matter your age, hygiene, or medical history. Your skin is your body’s largest organ, so it’s not surprising that plenty can (and does) go wrong with it.
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