Our self image is the inner picture we carry of ourselves. If what we see is not healthy and according to the scriptures, we will suffer from fear, insecurity and various forms of misconceptions about ourselves. Please note that I said "we will suffer".
People who are insecure about themselves suffer in their mind and emotions, as well as in their social and spiritual lives. Studying the word of God and receiving His unconditional love and acceptance have brought healing to many lives, myself inclusive, it will do the same for you.