Dry lips after pregnancy may be caused by environmental factors or irrational dietary structure, or it may be caused by diseases, which need to be analyzed in combination with environmental conditions and accompanying symptoms. If dry lips occur in winter and spring, it is mostly related to low humidity in the environment and fast evaporation of water from the lips. In addition, if there is insufficient water or vitamin C in the diet, coupled with the increased consumption of water and vitamin C after pregnancy, it is easy for dry lips to occur due to dehydration and vitamin C deficiency. By moderately increasing the amount of water consumption or eating more vegetables and fruits, you can change this cause of dry lips. If dry lips are accompanied by panic, fear of heat, need to check the thyroid function, to rule out hyperthyroidism in pregnancy. If the dry lips are accompanied by excessive drinking and urination, it may be related to diabetes, and blood sugar needs to be checked to determine whether it is gestational diabetes or diabetes in pregnancy.