What are the causes of hair loss?

1. Androgenetic alopecia

It is autosomal dominant, and its genetic characteristics need to be manifested under the action of androgen.

2. Neurogenic alopecia

Hair loss often occurs when there is too much mental stress. Under the action of mental stress, the human body contraction of the erector spinal muscle, hair upright, vegetative nerve or central nervous system dysfunction, hair follicle papilla change, and malnutrition, which leads to the inhibition of hair growth function, hair into the resting phase, and hair loss.

3. Endocrine alopecia

Hair growth is affected by a variety of endocrine hormones, so when endocrine abnormalities occur more hair loss diseases, such as postpartum, and menopausal hair loss.

4. Nutritional Alopecia

Hair is the external manifestation of the body's condition. Poor nutrition and abnormal metabolism can cause changes in hair quality and color, and severe malnutrition can even lead to diffuse alopecia.

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 changes and even hair loss.

7. Infectious hair loss

Infection of 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

Hair loss or thinning is caused by developmental defects, patients commonly have thin and fine hair, or hair is normal at birth and soon falls out without regeneration, which can be divided into isolated defects and other malformations.

10. Seasonal Alopecia

Seasonal alopecia is common in autumn, mainly because after autumn, the weather becomes cooler, the climate is dry, and the water of the skin mucous membrane accelerates evaporation, which will lead to a decrease in sebaceous gland secretion, causing dry hair and hair loss.