Iron deficiency anemia can cause a variety of symptoms, such as fatigue, dizziness, headaches, pale skin, shortness of breath, cold hands and feet, chest pain, and brittle nails. In addition, iron deficiency anemia can also cause cravings for non-nutritive substances such as clay, dirt, or ice. These cravings are known as pica and can indicate a severe iron deficiency. Other symptoms may include hair loss, poor appetite, sore tongue, and irritability. Left untreated, iron deficiency anemia can lead to more serious problems such as an increased risk of infection, heart problems, and poor growth and development in children. It is important to seek medical help for any of these symptoms to prevent further health problems.