Image, Self-Image, and Self-Esteem
Image
is how you really
are, how you look and what you wear and so on, self-image is your picture
of yourself, and self-esteem
is how you value
yourself. Oftentimes people's self-image is quite different to their actual image leading to having a picture that is not realistic or not seen as others see you, especially having a self-esteem that is generally talking yourself down
everywhere, or, which is less common, talking yourself up.
Both can be a problem potentially. The first is often associated to other issues such as social phobia, anxiety, or depression.
The second might just mean you are very cheerful and confident - but it could also might mean becoming quite arrogant or harming others (like with personality disorders).
Useful resources on the web: Click pictures to open in a new tab.