In the pollen season, you should minimize going out, and when you must go out, you should do a good job of protection, you can wear a good isolation mask, and you can also use pollen blocking agent, which also has a certain effect; 2, saline rinse nasal cavity: for those with mild symptoms, such as only mild nasal congestion or a small amount of nasal mucus, you can use saline to rinse the nasal cavity, clean up nasal secretions, and improve the ventilation and drainage of the nasal cavity. When nasal congestion is severe, hypertonic saline rinsing can be used to help relieve swelling of the nasal mucosa and effectively improve symptoms. However, pregnant women due to hormonal effects, the nasal mucosa is in a state of congestion, improper rinsing is easy to cause nosebleeds; 3, medication: if the above methods are ineffective, and the pregnant woman has passed the early stage of pregnancy, i.e., the first three months, you can comply with the doctor’s instructions to use anti-allergy drugs, such as loratadine, budesonide, etc., which is relatively safe to use during pregnancy, and will not affect the growth and development of the fetus, and is usually not a risk of teratogenesis.