In many cases, the disorder cannot be attributed to any specific cause but the following conditions can contribute to the problem.
The stomach pokes through the diaphragm, preventing the muscle fibers of the diaphragm from closing the lower end of the oesophagus. The oesophagus remains wide open which allows stomach acid to get into the oesophagus.
If the person is overweight the excessive fat in the abdominal cavity increases the pressure inside it. This causes the contents of the stomach to travel up into the gullet. Loss of weight reduces stomach acid reflux.
Because the uterus increases in size during pregnancy, it presses on the stomach, creating higher pressure inside it, which increases the tendency to reflux. In addition, hormonal changes lead to relaxation of the oesophageal sphincter during pregnancy.
The more the stomach is stretched by food, the higher the tendency to reflux. The tendency is also increased by eating fatty meals as fat delays gastric emptying. Try to avoid large rich meals, particularly in the evening and this will reduce the tendency to reflux.
Chocolate, peppermint, coffee, fruit juices, sour, hot spicy food and alcohol and over eating prevent the oesophageal sphincter from working properly.
Tobacco prevents the oesophageal sphincter from working in order, reduces the rate at which the stomach empties and increases stomach acid production.
Constipation increases the tendency to reflux by raising pressure inside the stomach cavity.
The tendency to reflux increases when you are lying down. This is just due to gravity. A simple way to change that is to use a pillow under the mattress or to raise the head of your bed by 3 inches with blocks or a house brick under the bed frame.