Just 1 week pregnant, the stomach should not be bloated. The cause of stomach swelling is usually gastrointestinal dysfunction, oral lactobacillus tablets to regulate gastrointestinal, at the same time need to eat a reasonable diet, pay attention to the intake of high-quality proteins, eat more vitamin-rich fruits and vegetables, avoid cold, spicy, stimulating diet. But we need to pay attention to exclude ectopic pregnancy, after pregnancy, pay attention to observe the development of the embryo, need to do gynecological ultrasound, observe the development of the embryo. Ectopic pregnancy is often characterized by vaginal bleeding, lower abdominal pain, lower back pain, abdominal cramps and other symptoms, and sometimes abdominal distension, so you need to rule out. Abdominal distension and pain also need to exclude gynecological tumors, intestinal disorders, etc., so further examination is needed to clarify the diagnosis.