Symptoms of chest tightness at 15 weeks of pregnancy are not normal and require medical attention to check the cause and target treatment. Chest tightness in 15 weeks of pregnancy may be caused by environmental closure, fetal compression, heart disease, anemia, etc. Pregnant women should first find out the cause of chest tightness, whether it is due to physiological causes, or due to disease. If the cause is physiological, pregnant women should pay attention to rest, try to lie on the left side, and maintain indoor air circulation. If it is caused by disease, it is necessary to identify the cause of the disease in a timely manner, you can carry out routine blood tests, electrocardiograms, cardiac ultrasound and other tests. If it is heart disease, the severity of the disease needs to be assessed, and if it seriously affects the health of the mother, the pregnancy needs to be terminated if necessary; if it is anemia, it is necessary to take blood replenishing drugs under the guidance of the doctor, such as ferrous sulphate, blood-sourcing treasure combination and so on.