I had my arm massaged with a device that looked like a dolphin and now i have a red bruise the size of an egg, hurts when i touch it. ?

Hematoma?: Your history suggests you developed a hematoma, which is an advanced bruise where there is a collection of blood in the soft tissues beneath the skin. Those that bruise easily or that take blood thinners such as warfarin or Aspirin are more likely to develop hematomas after minor trauma. Gentle icing, resting the area and tincture of time typically allows for resolution.