不当吸吮行为是指经常反复吸吮口唇、手指、脚趾、毛巾、被角等行为。其中,以吸吮手指最多见,常发生于一至两岁婴儿。长时间吸吮手指或脚趾,可因局部刺激而使手指或脚趾变粗、变大,影响美观和精细动作的发展。另外,吸吮手指很容易造成寄生虫感染。吸吮口唇轻者可使口唇变厚 Improper sucking behavior is often repeatedly sucking on lips, fingers, toes, towels, horns and other acts. Among them, the most common sucking fingers, often occurs in infants from one to two years old. Sucking fingers or toes for a long time may cause the fingers or toes to become thicker and larger due to local irritation, which may affect the development of beautiful and delicate movements. In addition, sucking fingers can easily cause parasitic infections. Lighter lips can thicken lips