Symptoms of low iron in the blood, or iron-deficiency anemia, include weakness, fatigue, shortness of breath, pale skin and dizziness, according to Healthline. Soreness or swelling of the tongue, a feeling of tingling in the legs, and cravings for non-food items, such as dirt, clay and ice, are other symptoms.
Iron deficiency also causes brittle nails, headache, irregular or fast heartbeat, and cold hands and feet, notes Healthline. Inadequate nutritional intake, pregnancy, blood loss from menstruation and internal bleeding all cause iron deficiency. Some people suffer from disorders, such as celiac disease, that interfere with the body’s ability to absorb iron. Doctors recommend iron-rich foods in the diet and supplementation with iron tablets to correct iron deficiency.