A hiatal hernia occurs when a portion of the stomach ascends to the thorax, through an opening located in the diaphragm, the barrier that separates the thorax from the abdomen. When the stomach moves to the thorax, the aforementioned separation loses its function and a gastroesophageal reflux occurs, that is, the gastric contents return to the oesophagus and irritate it. Symptoms caused by this condition may be burning in the chest or throat, hoarseness, asthma or breathing problems. The symptoms worsen after eating, when sleeping or bending over. The treatment of hiatal hernia depends on its severity, and sometimes it does not require any type of therapy. In mild cases, the aim is to control the symptoms, which improve with changes in the diet and postural changes. In the most severe cases, an operation, usually performed with fundoplication technique (minimally invasive laparoscopy), may be chosen.