Self- consciousness is being conscious about oneself. If I hesitate to look into the mirror or go in front of someone or avoid being in their presence because of the thought that I am not as rich as him, it is self-consciousness. Fear of negative judgement of others is what makes me feel self- conscious. It is the inability to understand that others are none to define us and it does more harm than good.
Such a feeling arises when you have doubts about your own ability or looks. When you are haunted by such thoughts you have to find out a way to come out of that and lead a peaceful life.
Identifying self-conscious people are so simple. If a person is a man and he talks as if there is no end to it or looks at the mirror to comb his hair or constantly works on his belt to tighten it are some of the clues to find out whether a man is self-conscious or not.