Heartburn occurs when the stomach acids flow back into the lower end of the esophagus (reflux). During pregnancy, there are two causes: hormones relax the muscles of the upper opening of the stomach allowing acids to reflux; and your uterus, which is growing, pushes against the stomach causing acids to flow back into the esophagus.
What can I do?
Advice to avoid heartburn.
If you have heartburn:
Take small mouthfuls of water or milk.
Sit or stand straight. The horizontal positions aggravate the condition.
At night, raise the head of your bed or use additional pillows.
Try sleeping on your side.
If nothing works?
Talk with your health care provider or pharmacist before taking any antacids or other type of medication.