I agree with HK, sometimes we need help to tap into why...
A "trick" a therapist taught me years ago, is when I talk to myself, talk to myself like I'm parenting myself. If I'm feeling anxious, ugly, not funny enough, good enough, etc. instead of just letting that internal chatter spin out of control on itself on a constant loop, stop. Ask my "little self" why she is feeling XXX. Sometimes she'll know, sometimes she won't, but then I talk to my little self like I would my child. How would you help a child navigate those feelings? This technique was surprisingly helpful. I felt foolish, but who knew what was going on in my head anyway?