suitable for all ageswarning : Pregnant women Note: 0-4 months of pregnancy: should not be used， because attracting nipple will stimulate uterine contractions， affect the fetus. 4-10 months of pregnancy: the fetus in the womb has stabilized， use， prenatal last month， nipple stimulation may cause uterine contractions， when the use of discomfort immediately disabled， detailed information can contact customer service.How long will the good appliance use; see the case pro nipple retraction is not serious， some not serious enough about 7 days， generally 30 days or so， serious recovery within 1-6 months， this can not be anxious， retraction after so long， will not look like a stick with will be good. Shortly touch with the interval that aloe vera gel or cream product such as relapse nipple from this place， easy to dry skin