10. Anemia
It is the decrease or loss of the level of hemoglobin in red blood cells. This iron-rich protein is responsible for supplying oxygen to different parts of the body. Therefore, in patients with anemia, the amount of oxygen that goes to the brain is reduced, which in turn generates other complications such as fatigue, lack of energy, weakness, shortness of breath, dizziness, palpitations, and paleness. This symptom may be indicative of internal bleeding, so attention should be paid to other signs, such as blood in bowel movements to see a doctor as soon as possible.