But your mystery rash may have a much simpler explanation ... your body's histamine response.) These stress hives typically appear on your face, neck, chest or arms. They may be small, or they ...

Splotches can appear from the neck to the navel (belly button), and ... everyone experiences stress, and stress rashes and hives may be more common than you think. For example, a study published ...

Hives, also known as urticaria, are raised, itchy welts on your skin that occur due to an allergen. The reaction is ...