1.Hereditary hair loss
Autosomal dominant inheritance, its genetic characteristics need to be manifested under the action of androgens.
2.Neurogenic alopecia
Hair loss often increases when there is excessive mental stress. Under the effect of mental stress, the human body hair standing muscle contraction, hair erect, plant nerve or central nervous function disorders, hair follicle papilla change and malnutrition, resulting in hair growth function inhibition, hair into the resting phase and hair loss.
3.Endocrine alopecia
Hair growth is affected by a variety of endocrine hormones, so when the body endocrine changes may cause hair loss, such as postpartum, menopausal hair loss.
4.Nutritional hair loss
Hair is the external manifestation of the body condition, malnutrition and abnormal metabolism of the body can cause changes in hair quality and hair color, serious malnutrition even leads to diffuse hair loss.
5.Physical hair loss
Common physical factors that cause hair loss include mechanical stimulation and exposure to radioactive substances.
6.Chemical hair loss
Chemical factors can lead to hair color change or even hair loss. The use of poor quality shampoo, irritating hair dyes, and frequent hair dyeing and perming may cause hair loss.
7.Infectious alopecia
Infection by various pathogens is an important factor in hair diseases, mainly including bacteria, viruses, fungi, spirochetes, parasites and other infections.
8.Symptomatic alopecia
Certain systemic or local diseases can be accompanied by hair loss.
9.Congenital alopecia
Developmental defects caused by the complete absence or thinning of hair, patients commonly thin and fine hair, or normal hair at birth, soon after the loss of non-regeneration, can be divided into isolated defects and other deformities.
10.Seasonal hair loss
Generally easy to lose hair in summer, because the high temperature of summer pores expansion lead to hair loss, autumn and winter is not easy to lose hair, because the temperature of this period down pores closed.