Symptoms of zinc deficiency are mainly manifested in slow growth and development, decreased appetite, heterophagia, low immunity, slow wound healing, and damage to the skin and mucous membrane barrier. 1. Slow growth and development: Zinc deficiency has a particularly strong impact on children. In childhood, zinc deficiency can lead to slow growth and lower height and weight than children of the same age. 2. Loss of appetite: After zinc deficiency, the hyperplasia and imperfect keratinization of the oral mucosa will lead to abnormal development of taste buds in the papilla of the tongue, causing abnormalities in the appetite and leading to loss of appetite. 3. Ectophagy: People with zinc deficiency are very prone to consume unconventional foods, such as paper, wallpaper and soil. 4. Low immunity: Zinc is involved in humoral and cellular immunity, which can increase the phagocytic capacity of phagocytes, thus enhancing resistance, and zinc deficiency will lead to low resistance. 5. Delayed wound healing: Zinc plays a role in repairing the epithelium in the process of wound healing, and a deficiency of zinc can lead to difficulties in wound healing. 6. Impaired skin and mucous membrane barrier: When zinc deficiency occurs, various rashes, dermatitis, mouth ulcers and other diseases can occur. There are other manifestations of zinc deficiency, zinc plays an important role in human health, if you suspect a zinc deficiency, it is recommended to consult a doctor in a timely manner to identify the cause, the cause of the treatment, it is not recommended to unauthorized use of medication.