Girls and women sometimes twirl their hair as a sign of romantic attraction. However, hair twirling is also sometimes a manifestation of anxiety or simply a self-comforting ritual.
According to Psychology of Dating, in romantic flirting, girls and women sometimes twirl their hair to attract someone. The behavior is at times done unconsciously. The action of twirling draws attention to her hair, an attractive trait to men. Hair twirling is often combined with other flirtatious behavior, such as a warm smile.
Hair twirling does not always signal romantic attraction, however. According to What to Expect, in children, hair twirling is a self-comforting behavior used to release tension and pent-up energy. According to Body Language Expert, hair twirling can also signify anxiety, nervousness, uncertainty or shyness.