What causes nausea and vomiting at 34 weeks of pregnancy?

In general, nausea and vomiting at 34 weeks of pregnancy may be caused by various factors such as uterine enlargement, hormonal fluctuations, gastroesophageal reflux, hyperthyroidism, cholecystitis, and others. It is recommended to seek medical attention promptly, identify the underlying cause, and receive symptomatic treatment under the guidance of a qualified physician. Specific analyses are as follows:

1. Uterine Enlargement

As pregnancy progresses, the uterus gradually enlarges. By week 34, the enlarged uterus may compress the gastrointestinal tract, affecting digestion and gastric emptying, thereby causing symptoms of nausea and vomiting. Adjust your diet by avoiding oily and hard-to-digest foods, eat smaller meals more frequently, and maintain moderate physical activity to promote gastrointestinal motility.

2. Hormonal Fluctuations

Changes in hormone levels during pregnancy can also lead to nausea and vomiting. Elevated levels of hormones such as human chorionic gonadotropin (hCG) may stimulate the gastrointestinal tract, triggering nausea and vomiting. Typically, as pregnancy progresses, hormone levels gradually stabilize and symptoms resolve on their own.

3. Gastroesophageal Reflux

Gastroesophageal reflux is usually caused by the backflow of stomach acid and digestive enzymes into the esophagus. During pregnancy, hormonal changes and uterine enlargement that compress abdominal organs can easily lead to acid reflux into the esophagus, irritating the esophageal mucosa and causing feelings of nausea and vomiting. Symptoms may include chest pain, belching, and difficulty swallowing. Medications such as omeprazole enteric-coated capsules, pantoprazole sodium enteric-coated capsules, or famotidine tablets may be used under the guidance of a healthcare provider.

4. Hyperthyroidism

Hyperthyroidism is generally associated with genetic factors or other diseases. Excessive thyroid hormone increases metabolic rate and affects gastrointestinal function, leading to nausea and vomiting. It is often accompanied by symptoms such as weight loss and hand tremors. Treatment may include medications such as methimazole tablets, propylthiouracil tablets, or metoprolol tartrate tablets, taken as directed by a physician.

5. Cholecystitis

Cholecystitis may be caused by gallstones or infection. During pregnancy, bile stasis increases and gallbladder function weakens, making inflammation of the gallbladder more likely, which can result in nausea and vomiting. Additional symptoms may include right upper abdominal pain, fever, and jaundice. Medications such as metronidazole tablets, levofloxacin tablets, or amoxicillin capsules may be used under medical supervision to relieve symptoms.

In addition, maintaining a healthy lifestyle, eating a light diet, and ensuring adequate rest are recommended.