There will be secondary nasal deformity. The symptoms caused by cleft lip and cleft palate will be different, among which rabbit lip will be mainly secondary to nasal deformity, including incorrect tip of nose, too large nostril, too small nostril and sunken alar. Rabbit lip, or cleft lip, is a common birth defect, which appears in unilateral, bilateral or middle upper cleft lip due to incomplete fusion of fetal facial structure during development.