21 weeks pregnant with a hot water bag on the waist generally will not hurt the fetus, but the temperature of the hot water bag should not be too high, the hot time should not be too long, try to reduce the impact.
21 weeks pregnant for the mid-pregnancy stage, the development of the fetus in the womb will be more stable, with a hot water bag compress waist generally will not hurt the fetus, the temperature of the hot water bag should not be too high so as not to scald the skin, the hot compress time should not be too long, try to control the 10 to 15 minutes or so.
Mid-pregnancy due to the increase of the uterus and ligament pulling, may increase the pressure of the lumbar spine, causing lumbar pain symptoms, lumbar pain and discomfort can be appropriate hot compresses to relieve, hot compresses should be the correct method to minimize the impact on the fetus.
Hot compresses during pregnancy try not to put on the stomach, the fetus is relatively sensitive to heat, the abdomen temperature is too high, the fetus may feel uncomfortable.
After pregnancy, do a good job of pregnancy checkups, the body appears to have discomfort to seek medical attention in a timely manner, do not blindly deal with their own.