Consider the adjectives that people use to describe you in order to gauge how you come across. Compare these descriptors with how you would like others to see you.
IF the adjectives used by others to describe you reveal someone who mainly gives and nurtures others, then you would benefit from learning to take care of yourself first. Most likely, you think of other people at the expense of everything else. It is not selfish to look out for yourself. It also is OK to look good and spend money on clothes that convey all of your wonderful inner qualities.
IF you find that no one uses visual adjectives to describe you, then you may need to work more on your external image. Hire an image consultant, or use a personal shopping service at a department store. A good consultant will ask a series of questions in order to help you select clothing that reflects your lifestyle and personality. If you don’t like what they suggest, try working with someone else.
IF the description you receive of yourself is more superficial, bringing out your personality should be the focus. Take classes and workshops that help you to express your inner strength and beauty.