Symptoms of micronutrient deficiencies cannot be generalized, and need to be judged according to the actual lack of micronutrients, for example, micronutrient iron-deficiency anemia, zinc deficiency caused by slow growth, copper deficiency caused by anemia, anorexia, and so on. Essential trace elements include iron, copper, zinc, selenium, chromium, etc. According to the nature and distribution of different trace elements, the clinical symptoms caused by the lack of different trace elements are not the same. 1. Iron is an important component of hemoglobin in human body, if the patient’s body lacks iron, iron deficiency anemia is often induced, resulting in pale skin, general weakness, fatigue and other symptoms. 2. Copper deficiency can cause anemia, leukopenia, arrhythmia, anorexia, hepatosplenomegaly and other symptoms. 3. When the human body lacks zinc, zinc deficiency may be induced, and the patient will often have anorexia, alopecia, night blindness, xenophagia and other symptoms, and may also be manifested as backward growth and development, skin rashes, visual impairment. 4. Selenium deficiency patients will have muscle pain, muscle atrophy, walking weakness. 5. Chromium is an important component of the glucose tolerance factor in the body. Long-term insufficient chromium intake can lead to production stagnation, increased blood lipids, abnormal glucose tolerance and other symptoms. Symptoms of micronutrient deficiency in the body are not the same, and it is recommended that patients with the above symptoms such as skin pallor should consult a doctor in time to clarify the specific cause.