The disappearance of chest swelling and pain in 6 weeks of pregnancy may be a normal phenomenon, or it may be fetal arrest, normal phenomenon does not require special treatment, fetal arrest needs to be cleared. 1. Normal phenomenon: after a woman is pregnant, due to elevated levels of hormones in the body, there will be symptoms of chest swelling and pain, the duration of each person is different, some people may be in the pregnancy of 6 weeks or so, the symptoms of chest swelling and pain will be alleviated, the development of the fetus at this time is normal, do not need special treatment. 2. Fetal termination: 6 weeks pregnant, chest swelling pain disappears may also be fetal termination, fetal termination after the body’s hormone levels will decline, early pregnancy reaction will disappear, if diagnosed as fetal termination, need to be early clearance treatment. There may be other reasons for the disappearance of chest pain in 6 weeks of pregnancy, it is recommended to go to the hospital in time, improve the examination to clarify the cause, and then give targeted treatment or standardized treatment.