A strong negative feeling and/or sensitivity when it comes to your hair which can lead to certain aspects such as cutting, feeling uncomfortable when someone touches it, low self-esteem when it comes to your hair, and other aspects (as aspects are different for everyone).
Causes of this feeling are related to regular low self-esteem or bad experiences relating to hair (such as difficulty taking care of it, issues from difficulty taking care of it, and people giving off bad comments about it.)
My friend has been dealing with "Hair Anxiety" recently.