The causes of alopecia areata are varied, and the specific factors for each individual may differ. However, it is mainly related to reduced immunity, lack of vitamins and trace elements, long-term consumption of spicy and irritating food, frequent staying up late with anxiety and tension, and poor mood. Some teens may also develop alopecia areata if they frequently suffer from scalp folliculitis, abscesses, or cysts, which can damage the hair follicles. Only a small number of cases may be related to genetic inheritance. Therefore, once this condition occurs, it is essential to seek treatment at a formal medical institution. With long-term persistence, it is possible to cure the condition, and adopting good dietary and lifestyle habits can help with the treatment.