The telltale itch begins subtly – perhaps a slight irritation on your arm or an uncomfortable warmth spreading across your chest. Before long, your skin erupts in patches of redness, bumps, or scales ...

Skin conditions like psoriasis and eczema can have rashes that are difficult to distinguish by eye. tylim/iStock via Getty Images Plus Rashes can be thought of as a dysfunctional community of skin ...

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Although rare, a red rash may indicate leukemia, which is a type of blood cancer. A leukemia rash can look like tiny dots, big plaques, or itchy bumps that do not turn white when you press them.