The respiratory rate decreases during sleep, and the lung ventilation volume decreases. If a woman has a cold or rhinitis, it can cause poor breathing, resulting in a heavy breathing sound. At this time, if the cold or rhinitis is cured, the breathing sound will be reduced naturally. If there is no organic abnormality in the rhinitis department, just follow up and observe. Under normal circumstances, the size of the breathing sound varies from person to person. Keeping the head warm and moist when sleeping, drinking more water and strengthening physical exercise are conducive to the reduction of the breathing sound. The sound of breathing will be reduced if you sleep on your side and do not lie flat.