Alopecia areata can be caused by a variety of factors and can occur at any age. Generally, alopecia areata in children is mostly related to picky eating or an imbalanced diet, including excessive snacks. Among adolescents or middle-aged individuals, alopecia areata can be related to high stress levels, vigorous sebaceous gland activity, or the frequent consumption of spicy and stimulating foods. For middle-aged and elderly people, it could be related to other diseases within the body, such as liver or kidney disease. Therefore, it is important to foster good dietary and lifestyle habits, strengthen physical exercise to boost immunity, include more legumes in the diet, and regularly massage the scalp, all of which can serve as preventive and therapeutic measures.