Drooling in bed after pregnancy may be caused by oral problems, genetic factors, or changes in hormone levels in the body after pregnancy, etc. The temperature of the mouth can easily encourage the growth and reproduction of bacteria, and if the food left in the mouth and teeth is not cleaned up as soon as possible, periodontal disease can easily occur, and the phenomenon of drooling can easily occur after the occurrence of adverse stimuli. If there is a congenital malocclusion, it will also lead to the problem of drooling in pregnant women. After pregnancy, the hormone level in pregnant women will change, and food will easily enter the sphincter, which will lead to sphincter relaxation and acid reflux, which will stimulate the mucosa and cause drooling in bed. Daily attention should be paid to oral hygiene, if the pregnant woman drooling at the same time with other uncomfortable symptoms, such as gum pain, stomach burning, etc., should seek medical attention as soon as possible, the symptomatic treatment.