Yes, anxiety disorders can cause hair loss. Stress, which is a primary symptom of anxiety, can cause hair loss, a cause-and-effect relationship known as telogen effluvium. Stress disrupts the normal growth and rest cycle for a person’s hair. When telogen effluvium occurs, people can lose hair in clumps while brushing or stylizing their hair. However, hair loss from this condition is often temporary and stops when stress diminishes.