Pretty much everyone has at least a few things about which they can, at least sometimes, feel insecure. Insecurities, in and of themselves, are often thought of as pretty common. Most people probably don't feel 100 percent confident about absolutely everything regarding themselves, their relationships, and their lives all of the time. For some people, however, insecurities are more deeply rooted and can seriously affect or interfere with all sorts of different facets of their lives. In these cases, there could be some signs your insecurities might actually be a personality disorder, which, if your insecurities are severe, might mean that you should seek out a qualified therapist who'd be able to determine whether you fit the criteria for a diagnosis as well as where to go from there.
Though there are some heavily stereotyped depictions of personality disorders in pop culture, if you've never had a reason to learn more about this category of disorders, you might not actually know that much about them. Psychology Today noted that, technically, there are 10 different personality disorder diagnoses and each involves a thought pattern in which the person thinks in black and white and can interfere with interpersonal relationships. For some with personality disorders, it can be difficult to maintain relationships with others and for those with some kinds of personality disorders, insecurity plays a major role.
And while having these kinds of insecurities by no means indicates that you definitely have a personality disorder, they're the kinds of things that those with personality disorders might recognize all too well.