Question 1: Hello doctor, my relative has just been diagnosed with hepatitis B. Because we live close together, the adults and children of our two families often eat together. The main thing I want to ask is whether the children will be infected? How long will it take to check it out? Dr. Cui Lixia answered: The main routes of transmission of hepatitis B include blood infection, mother-to-child transmission, and sexual transmission. Daily life contacts, such as talking to each other, shaking hands, hugging, sharing meals, etc., generally will not be infected. In addition, as long as newborns receive hepatitis B immune globulin (HBIG) and hepatitis B vaccine within 12 hours of birth, the chance of infection is also very small. If you are worried, both adults and children should go to the hospital to check the five items of hepatitis B. However, there is a window period. Generally, hepatitis B can be detected two or three months after infection, so it is recommended to check again after three months. Question 2: Hello doctor, can you help me see what’s going on with my baby’s belly? The belly button is bulging when sitting, but it is not obvious when sleeping or standing. It is one year and one month old. Dr. Luo Zhen answered: This situation is normal. Basically every baby has a big belly. As it grows and develops, it will gradually become less visible. Question 3: Hello, doctor, can you help me find out whether the instep of my child is fat or swollen? Dr. Sun Cuiying answered: Hello, you can press the baby\’s instep. If there is a pit when pressed and it is difficult to bounce up, it means it is swollen. You need to find out the cause and observe whether the two feet are equally fat. If there is no pit when you press it and it is soft, it should be fat. If your baby\’s mental state is normal and he is eating and drinking normally, you can rest assured.