Sakura has schizophrenia.
Naruto is hyperactive.
Sasuke has both a superiority and inferiority complexes. According to Kakashi anyway.
Choji has some sort of eating disorder.
Hinata has social anxiety.
Neji had a superiority complex too. Like Sasuke, but different.
Shikamaru at times seems almost depressive.
Tenten also probably has an inferiority complex from her own unimportance.
Kiba has clinical lycanthropy.
Ino has Shopholm Syndrome.
Shino ALSO has some sort of inferiority complex considering how often people ignore him. Actually, maybe a social phobia would fit him better....
Sai is a sociopath.
Don't know what the **** is wrong with Lee. Not sure if I want to.