Stress
Although the main reason behind the occurrence of alopecia areata is the family history and genetics, certain other external factors can contribute to the development of alopecia areata. Researches show that severe stress may trigger the disruption of the hair growth process. Prolonged stress can reduce the blood flow to the hair follicles resulting in slower hair growth. So stress worsens the condition for the people suffering from alopecia areata. Although, there are no solid research pieces of evidence of stress being the culprit behind the cause of alopecia areata.