Level 1: Causes of nasal congestion in pregnant women and preventive measures 1.1 Causes of nasal congestion during pregnancy Nasal congestion during pregnancy is due to the increase in hormone levels in pregnant women, leading to congestion of the nasal mucosa and increased secretions. In addition, the increase in blood volume during pregnancy causes the nasal mucosa to swell, causing The airway is narrowed, affecting breathing. 1.2 Preventive measures Pregnant women can take the following measures to prevent nasal congestion: ① Maintain indoor air circulation; ② Wash hands frequently to avoid colds; ③ Drink more water to keep the body moist; ④ Exercise appropriately to enhance the body\’s immunity. Level 2: Treatment methods for nasal congestion in pregnant women 2.1 Dietary adjustments Pregnant women can eat more