The crochet hook is not used skillfully enough, or the thread tension is inconsistent. The asymmetry of the crochet on both sides of the carrot hairpin is due to insufficient skill in using the crochet hook, inconsistent thread tension, or mismatched crochet hook size. When crocheting, you need to pay attention to factors such as the grip of the crochet hook, the tension of the thread, the size of the crochet hook, and the design of the pattern, in order to crochet a beautiful carrot hairpin.