June 65438+1October 65438+April British Mirror reported that Will Smith's wife, jada pinkett smith, recently shared a video on social media, in which she claimed that she suffered from alopecia areata, an autoimmune disease that can lead to alopecia areata. The Emmy winner admitted that he was bald not because he wanted to pursue a fashionable hairstyle, but because he suffered from alopecia.

Jada pinkett smith once talked about his "hair loss problem" in the award-winning talk show on 20 18, and said that it was terrible when he first started to lose his hair. Jada pinkett smith recalled: "One day when I was taking a shower, my hair began to fall off a lot." After that, she began to lose her hair.

In fact, hair loss is a common phenomenon in our lives, and it is also a headache for us. If you want to prevent hair loss. Therefore, we must first know what hair loss is. Only in this way can we prevent and treat our hair loss in a targeted manner.

Hair loss is the obvious shedding, thinning or breaking of hair, which affects both men and women.

What are the causes of hair loss? Everyone can sit accordingly.

1. Androgenic alopecia

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

2. Neuropathic alopecia

When mental stress is too great, hair loss tends to increase. Under the action of mental stress, the hair muscles of human body contract, the hair stands upright, the autonomic nerve or central nervous system function is disordered, the papillae of hair follicle changes, and malnutrition leads to the inhibition of hair growth function, and the hair enters the rest period, resulting in hair loss.

3. Endocrine alopecia

The growth of hair is influenced by many endocrine hormones, so when the endocrine is abnormal, it often causes alopecia diseases, such as postpartum and menopausal alopecia.

4. Nutritional alopecia

Hair is an external manifestation of physical condition. Malnutrition and abnormal metabolism will cause changes in hair quality and hair color, severe malnutrition and even diffuse alopecia.

5. Physical alopecia

Common physical factors leading to hair loss include mechanical stimulation and exposure to radioactive substances.

6. Chemical alopecia

Chemical factors can lead to hair discoloration and even hair loss.

7. Infectious alopecia

Infection of various pathogens is an important factor of hair diseases, mainly including bacteria, viruses, fungi, spirochetes, parasites and other infections.

8. symptomatic alopecia

Some systemic or local diseases may be accompanied by alopecia.

9. congenital alopecia

The hair caused by developmental defects is completely missing or sparse, and patients often have sparse and fine hair, or the hair is normal at birth and will not regenerate quickly, which can be divided into isolated defects and other deformities.

10. Seasonal alopecia

Generally, it is easy to lose hair in summer, because the high temperature in summer leads to the expansion of pores, and it is not easy to lose hair in autumn and winter, because the temperature drops and the pores are closed during this period.

Signs and symptoms of hair loss may include:

1. The hair on the top of the head is getting less and less. This is the most common type of hair loss, which appears with age. Male hair loss usually starts from the hairline on the forehead. The range of female hair loss is usually large. An increasingly common pattern of hair loss in elderly women is the receding hairline (forehead fibrosis alopecia).

2. Round or massive bald spots. Some people's scalp, beard or eyebrows will fall off, forming round or massive bald spots. Before the hair falls off, the skin may be itchy or painful.

3. sudden hair loss. Physical or emotional shock can lead to hair loss. Comb your hair, wash your hair or even pull it gently, and your hair may fall off in pieces. This kind of hair loss usually leads to overall hair loss, but it is short-lived.

4. The whole body hair falls off. Some diseases and drug treatments (such as cancer chemotherapy) may lead to total hair loss. Hair that falls off usually regrows.

5. Scales cover the scalp. This is a sign of tinea capitis. It may be accompanied by broken hair, redness and swelling, and sometimes oozing blood.

Now that we know the symptoms and signs of hair loss, how to prevent it? How many days should I wash my hair? In daily life, we should pay attention to develop good living habits to prevent hair loss, mainly in the following aspects:

1. Keep enough sleep. Try not to stay up late, staying up late will increase the risk of sudden death, and it will also make your head lose oil and hair. And high-quality sleep can promote the metabolism of hair and skin.

2. A balanced and reasonable diet. Increase the intake of whole grains, vegetables and fruits.

3. Hair and scalp should also be protected from the sun. Choose a hat or hair care product with sunscreen function.

4. Quit smoking and drinking. Alcohol and tobacco can make the capillaries in the head contract, affect blood circulation, and may also lead to an increase in androgen.

5. Good shampoo habit. The water temperature should not be overheated. Shampoo should foam on your hands first. When you blow your hair with a hair dryer, keep a little humidity, dry it with residual temperature or let it dry naturally. The air duct is 5- 10cm away from the hair.

Take care of yourself

In order to improve the overall health and thickness of hair, it may be helpful to avoid tight hairstyles, rough styling products or hard brushes. A balanced diet and foods rich in protein, fruits and vegetables can be recommended, because less iron, vitamin B 12, folic acid and other nutrients will slow down hair growth.

So take good care of your hair, stay up late less, relax, and do more exercise to restore your body to a better functional state.