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Alopecia hair loss refers to the phenomenon. Normal shedding of hair is in the catagen and telogen hair, due to new entrants into the catagen and constantly growing hair in a dynamic equilibrium, it can maintain a normal number of hair, that\’s normalPhysiological alopecia. Pathological alopecia refers to abnormal or excessive hair loss, for many reasons.
Cause of disease
1.Nerve alopecia Too much stress often occurs when an increase in hair loss. In the role of stress, the body piloerection muscle contraction, hair erect, or autonomic nervous function disorder, a major change in the hair follicle dermal papilla andMalnutritionResulting in inhibition of hair growth, hair and appeared to enter the telogen hair loss. 2. endocrine alopecia The hair is affected by a variety of growth hormone, so when an exception occurs when more hair loss caused by endocrine disorders, the most common is to hirsutism and androgenetic alopecia. 3. Nutritional alopecia The hair is external manifestation of physical condition, the bodyMalnutritionAnd metabolic abnormalities can cause hair and hair color change, seriousMalnutritionEven lead to diffuse hair loss. 4. Physical alopecia Common causes of hair loss include physical and mechanical stimulation exposure to radioactive substances. 5.Chemical alopecia Chemical factors that can lead to change hair color and even hair loss. 6. infected with alopecia Various pathogens hair disease infection is a major factor in a class, including bacteria, viruses, fungi, spirochetes, parasites and other infections. 7. symptoms of alopecia Some systemic or localized disease can be associated with hair loss. 8. Congenital alopecia Developmental defects caused by completely missing or sparse hair, thinning hair common in patients with small or normal hair at birth, and soon fall off no longer students, can be divided into isolated defects and other malformations. 9Seasonal Hair Loss Generally summer hair loss because of high summer temperatures cause hair pores, autumn and winter hair loss is not easy, because this time the temperature drops easy hair pores closed.