Constipation in 4 months of pregnancy can be improved by adjusting diet, proper exercise and taking probiotics. 1. Adjust the diet: drink more water, eat easy-to-digest food, eat a moderate amount of fresh vegetables and fruits, such as apples, bananas, grapes, carrots, tomatoes, etc., and avoid spicy and fine food. Reasonable diet reduces the burden on the stomach and intestines and is conducive to defecation. 2. Appropriate exercise: when constipation occurs in the fourth month of pregnancy, you can maintain a certain amount of exercise to help gastrointestinal peristalsis, such as walking, etc., which can alleviate the phenomenon of constipation. 3. Take probiotics: you can take probiotics under the guidance of the doctor to regulate the stomach and promote intestinal peristalsis, thus effectively improving the constipation, such as Bacillus subtilis bacillus granules, lactobacillus and so on. When constipation occurs during pregnancy, it is important to develop a good habit of regular bowel movements. When the symptoms are serious, you should go to a regular hospital in time and take targeted treatment measures under the guidance of a professional doctor.