Insecurity is a feeling of general unease or nervousness that may be triggered by perceiving of oneself to be vulnerable in some way. A person who is insecure lacks confidence in their own value, and one or more of their capabilities, lacks trust in themselves or others, or has fears that a present positive state is temporary, and will let them down and cause them loss or distress by "going wrong" in the future. This is a common trait, which only differs in degree between people.
This is not to be confused with humility, which involves recognizing one's shortcomings but still maintaining a healthy dose of self-confidence. Insecurity is not objective evaluation of one's ability but an emotional interpretation, as two people with the same capabilities may have entirely different levels of insecurity.
How does one cure insecurity????