During the breastfeeding period, you need to wear a loose and comfortable bra at night to avoid contamination of bedclothes and bedding by overflow of breast milk. In general, normal women should not wear bras at night to avoid obstructing the blood circulation of the mammary glands and causing breast diseases. Breastfeeding mothers may also experience breast milk overflow at night, which may contaminate bed sheets and bedding. On the other hand, if there is no bra to hold and support the full breasts, it will easily cause them to sag. Therefore, it is best to wear a comfortable bra at night. Breastfeeding is more likely to suffer from mastitis, breast milk stagnation and other breast diseases, it is recommended that breastfeeding mothers find breast pain and discomfort, go to the hospital in a timely manner, under the guidance of the doctor to take symptomatic treatment. During the breastfeeding period, women should eat more food rich in protein, such as eggs, pork lean meat, soy products, milk and so on. It is also necessary to properly supplement shrimp, fish, pork liver, oats, walnuts, peanuts and other foods, eat more fresh vegetables and fruits, to ensure that the intake of food nutritionally balanced, to avoid a single nutrient.