The feeling of chest tightness and breathlessness in early pregnancy may be caused by bad emotional stimulation, pregnancy reaction, disease, etc. The symptoms can be relieved by rest, and if the symptoms persist or worsen, it is recommended to seek medical treatment in time. 1, bad emotional stimulation: women who are anxious in early pregnancy for the first time, too worried about the fetus in the abdomen, long-term tension, chest tightness, breathlessness and other symptoms. You can try to breathe deeply when your chest is tight, relax your body and mind, listen to music to divert your attention, if your emotions cannot be released, you can try to receive psychological counselling; 2, pregnancy reaction: pregnancy reaction occurs in early pregnancy, triggering symptoms of chest tightness and shortness of breath, which is a normal phenomenon in early pregnancy. Pregnant women can go for a walk outdoors, breathe fresh air, and pay attention to rest and sleep, and the symptoms will ease on their own after a period of time; 3, combined diseases of pregnancy: if combined with respiratory diseases, heart diseases, upper gastrointestinal diseases during pregnancy, there may be chest tightness and shortness of breath in early pregnancy, because with the hormonal changes in the body and the increase in the size of the uterus during pregnancy, resulting in changes in the location of the abdominal organs. It will aggravate the clinical symptoms of the combined diseases during pregnancy, at this time, you need to go to the hospital and be treated under the guidance of a doctor.