Read the following information and then answer follwoing questions:
Heartburn is an esophageal symptom characterized by a burning sensation behind the breastbone. It may be related to gastric hyperacidity. There is little doubt that emotional disturbance, excitement, and nervous tension result in hyperacidity, which in turn may lead to heartburn. A gesture that usually accompanies heartburn is movement of the open hand up and down the breastbone. This is in contrast to the stationary tightly clenched fist of angina pectoris. Another important aspect of heartburn is that it is usually relieved, if only temporarily, by taking antacids. Antacids are used in other instances as well, particularly in cases of peptic ulcer. Pain is the outstanding symptom of peptic ulcer, a disorder that is chronic, periodic, almost always characterized by gnawing or burning, and coinciding with digestion. Nausea, emesis, and anorexia are uncommon.
1. Where does the burning sensation occur in heartburn?
2. Which factors lead to heatburn?
3. What is the use of antiacids?
4. What are the symptoms of peptic ulcer?

Heart burn is a burning sensation behind the Breast bone. Breast bone is another name for Sternum.
Gastric hyper acidity is the main cause of heart burn. The other factors that would likely lead to hyper acidity of stomach are emotional disturbance, excitement and nervous tension that ultimately leads to heart burn.
Antacids are medicines that are mainly used for symptomatic treatment of heart burn and peptic ulcers.
Pain is the main and outstanding symptom of peptic ulcers. In chronic cases, peptic ulcer presents with gnawing and burning sensation after food ingestion. Uncommon presentations of chronic peptic ulcers are Nausea, Emesis (vomiting) and Anorexia (loss of appetite)

Explanation:

The answers had been taken from the given paragraph in the asked question.