How long does hair follicle necrosis take?

Alopecia areata hair follicle necrosis depends on the condition. General alopecia areata after active treatment, will not show hair follicle necrosis. If alopecia areata caused by lupus erythematosus, will cause permanent hair loss. Alopecia areata hair follicle necrosis, depending on the situation, depending on the condition to determine whether necrosis or how long will necrosis. Hair follicle growth cycle has rest period, regression period, growth time, growth time about 3 years, regression period about 3 weeks, rest period about 3 months. Alopecia areata caused by different diseases is not the same, the general alopecia areata after active treatment, hair follicles will not show necrosis. If alopecia areata caused by lupus erythematosus, is permanent hair loss. The length of hair follicle necrosis and disease development, progress has a relationship. Alopecia areata if random medication or irregular treatment, will also show hair follicle necrosis, must go to the regular hospital to see whether there are other diseases exist, in order to determine in the end is a simple alopecia areata, or alopecia areata caused by internal diseases, so as to achieve symptomatic treatment, will not delay the disease.