When the weather changes or when the weather gets cold, you may feel that your hair is falling more than usual. But be careful if you find drainage holes blocked by hair after bathing, or if you find a pile of hair stuck on the comb after comb. Here are 11 common causes of hair loss for people to assess their condition and improve immediately, or seek help from a doctor.

Hair loss after surgery and rehabilitation

Any accident or disease surgical rehabilitation period may result in temporary hair loss. The growth cycle of hair is divided into growth period, degeneration period, and rest period. In the event of a major accident, it can affect the hair cycle and cause the hair to fall off. Hair loss is usually noticeable, especially for 3 to 6 months after the trauma.

Hormonal changes

It is easy to lose hair after birth because of hormone changes in the body, but the condition usually improves within a few months. Hormonal changes during menopausal may also lose hair, and these follicles may shrink, so you need to be aware of the treatment recommended by a dermatologist.


About two thirds of males have hair loss at age 60. Hair loss in men makes the hairline M-shaped, usually caused by genetic heredity and male hormones, while women also have male baldness, but unlike men, women’s hairline does not backward, but the hair volume becomes thinned. and the hair roots become thinly.

Excessive intake of vitamin A

According to the American Dermatology Society, taking too much vitamin A supplements or medicines can cause hair loss. It can be improved by controlling intake, and by reducing excess vitamin A, hair will return to normal growth.

Lack of protein

According to the American Society of Dermatology, if you don’t have enough protein in your diet, the body stops hair growth to store protein. This usually occurs after 2 to 3 months of reduced protein intake. It is recommended not to discard good sources of protein, including beans, fish, meat and eggs.

Emotional and tension

Emotional stress can lead to temporary hair loss, such as illness, divorce, death of a loved one, or care for older parents.


Among women aged 20 to 49, many suffer from anemia due to iron deficiency, symptoms include fatigue, headache, dizziness, pale skin and cold hands and feet. You can eat more black sesame, black beans, etc. If you are unsure if you have anemia, you can go to the hospital for testing.


This means hypothyroidism, insufficient secretion of thyroxine, the thyroid gland located in the neck, produces hormones that are important for metabolism and development, which can lead to hair loss when the hormones are insufficient.

Lack of vitamin B

Like anemia, it needs to be improved in terms of supplementation. Milk, oats, eggs, fish or lean meat, all have natural vitamin B. A balanced diet and good fat are important sources of supply for hair and overall health.

Immune system

The bald, is a hair loss phenomenon that occurs in a short period of time. There are many reasons for baldness. Among them, the immune system disorders are the result that the patient’s white blood cells treat the hair as an alien for unknown reasons, so the hair could not grow.

Drugs and chemotherapy

Including chemotherapy drugs for cancer treatment, blood thinners, beta-blockers for blood pressure control, and contraceptives can all cause temporary hair loss. Targeted drugs for cancer can destroy rapidly divided cells, such as cancer cells and hair cells.