Nipple corrector can be divided into several types, if the plastic material will be cheaper, about 50-100 yuan, resin material will be relatively expensive, between 100-300 yuan, nano material is the most expensive, to 300-500 yuan or so. The nipple corrector is not applicable to all people with sunken nipples, it is best to go to the hospital to check and buy under the guidance of a doctor. There are three types of sunken nipples, the first, type I partial sunken nipples; the second, type II nipples all into the areola; the third, type III severe sunken. For the first and second types of nipple indentation, correction by massage traction or negative pressure orthotic attraction is curable and requires adherence to treatment. For those who insist on conservative treatment for more than 3 months is ineffective, with the third type of severe depression, it is best to go to the hospital through surgery, usually wear suitable underwear, do not wear too tight clothes.