10. Difficulty breathing
Medically known as dyspnea, difficulty breathing is described as severe chest pressure, shortness of breath, or a choking sensation. It occurs due to high temperatures, obesity, great heights, and, in this particular case, when performing activities that demand a great effort. It is a consequence of the limited level of red blood cells in the blood and the lack of oxygen that this causes, which also responds to constantly losing blood through the stomach ulcers. In more severe cases, the lack of oxygen can cause fainting, so it is not advisable to carry out tasks that involve physical strength.