Insecurity comes from deep within you and is often caused by messages you heard early in life. You can feel insecure even when things are going well in your life because it never goes away unless you heal it. The difficulty arises when your inner dialogue gets in the way of being a happy, balanced or effective person.
So what do you do if you regularly experience insecurity? If you're really ready to move past it, you'll work on understanding why you feel the way you do and ask for help when you don't have the answers. There is a pervasive myth that working on your issues should be avoided at all costs. That approach never leads to happiness because the issue never goes away and often gets worse the more you try to ignore it. No matter how much you try to stuff it back in the box, it always pops out again, often at inappropriate times. Doing the work is the only way to alleviate the situation.
Feeling secure comes from building your self-awareness. It's the process of finding out who you are, what you love to do, what brings you joy, your interests, your passions in life and the issues that you need to resolve to move forward. When you understand yourself better, you make decisions based on feeling powerful and happy rather than insecure. What will you do to reduce your insecurity?