9 uncommon skin conditions

Sometimes irregular tan lines or unexpected allergic reactions leave a person's skin looking out of the ordinary. Other times, a common skin condition such as psoriasis (pictured) or eczema might affect a person's appearance. But some folks have health conditions that result in permanently atypical skin. From discolorations to mystery sensations, keep clicking for a look at 9 uncommon skin conditions, with help from the National Institutes of Health and First Skin Foundation...

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