'Mommy issues' often aren't as evident as we might think. They can transform into complex adult behaviors and usually stem from an unstable mother-child relationship. One might exhibit fear of abandonment, which can lead to clinginess or extreme independence. There could be issues in forming stable, loving relationships and trust could be a major hurdle. Some might find themselves always on the edge, interpreting criticism or slight disagreement as rejection. There's also a possibility of setting high, often impossible standards for their partners, mirroring their own experience of never being 'good enough' for their mother.