Iron deficiency in the body can cause iron deficiency anemia, which manifests itself in pale skin, shortness of breath, muscle aches, and difficulty concentrating. . Iron deficiency anemia patients due to iron deficiency anemia, can be manifested as general weakness, pallor, and some patients have breathing difficulties, irritability, etc.; for children with iron deficiency anemia, it may also affect their growth and development. 1. Pale skin: Due to iron deficiency, blood flow rate decreases and hemoglobin decreases, resulting in abnormally pale skin. 2. Shortness of breath: A lack of iron in the body may lead to a decrease in the oxygen content of the blood and shortness of breath may occur, especially when walking. 3. Muscle aches and pains: people with iron deficiency are reluctant to exercise, and sometimes muscle aches and pains may occur after exercise because iron deficiency can prolong the recovery period of muscles. 4. Difficulty concentrating: Iron deficiency patients may cause neurotransmitter synthesis changes, manifested in the inability to concentrate. It is recommended that patients with iron deficiency symptoms, seek medical attention as soon as possible, under the guidance of the doctor to take iron treatment. Daily also eat more iron containing food, such as green peppers, lemons, animal offal, spinach and so on.