Noticing a new or changing spot on your skin is a common reason people seek medical advice. Most spots, like moles or freckles, are harmless, but it's wise to be aware of changes. Doctors often look for the 'ABCDE' signs: Asymmetry (one half doesn't match the other), Border (irregular, jagged, or blurred edges), Color (uneven color), Diameter (larger than a pencil eraser), and Evolving (any change in size, shape, color, or if it starts to bleed, itch, or crust). They will ask you when you first noticed it, if it has changed, and if you have any other symptoms. Taking photos over time can be very useful for tracking. Seek urgent care if a spot is bleeding uncontrollably, is suddenly very painful, or shows rapid, dramatic changes accompanied by other symptoms like fever.