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

Known as varicose veins, these blood vessels, which return blood from ... the more delicate red or blue tracings that can pop up on the skin's surface like kinky spider webs, are a minor form ...

When you inject drugs, the needle breaks the surface of your skin and comes into contact with your blood. You should never share needles with others and should always use a new or sanitized needle ...