All of us feel pain in the stomach from time to time, but this is usually nothing serious.
The reasons may be too much food, consuming something that does not fit us or just a stressful day at work.
But sometimes stomach pain may be a symptom of something more serious, such as the stomach ulcer.

What is gastric ulcer?

Gastric ulcer, also known as peptic ulcer, is damage to the gastric mucosa or duodenum, the first part of the small intestine.
Gastric ulcer occurs when digestive acids damage the walls of the stomach or duodenum.

Here are the symptoms of gastric ulcer:
Pain in the stomach

The most common symptom of stomach ulcer is pain as something burns in your stomach. It lasts from several minutes to several hours and appears over a period of several days or weeks.
Starts between meals or while you are sleeping and briefly stops if you are taking analgesics.

Feeling of fullness

The feeling that you are full, followed by bloating, can be a symptom of a stomach ulcer.

Intolerance to fatty groceries

If you have a stomach ulcer, you will not be able to eat fatty foods without feeling discomfort.

Acids

If you have frequent acids and last for a long time, you should visit your doctor.

Nausea / vomiting

Although less common, both nausea and vomiting may be symptoms of stomach ulcer.

Weak appetite

With pain in the stomach and discomfort, your appetite may change depending on their occurrence.

Unintentional weight loss

If you suddenly lose weight and not hold your diet, consult a doctor.

Other symptoms

And other less frequent symptoms should not be overlooked such as vomiting blood, feeling weak, breathing problems, dark blood in the stool, or a stool that is black. Even the above symptoms are weak, you may have a stomach ulcer, so you must see your doctor. Without treatment, your condition will get worse.

Source: http://www.crnobelo.com/zivot/zdravje/53705-alarmantni-simptomi-za-chir-na-zeludnikot