There are many reasons for hair loss, including diet, lack of minerals, drugs, stress or serious illness, pollution and genetics. Up to one-third of the population suffers from hair loss, and many of them are women.  Although some factors cannot be controlled, such as genetic factors, such hair loss cannot be completely prevented, but you can try to keep your hair in optimal condition and prevent them from falling early.
Prevent hair damage
Use less hair dryers. High temperatures can weaken hair proteins. Continued heating and drying can cause the hair to be fragile and fragile, causing the hair that should not fall off to fall off in advance.  Natural air drying is best for hair, so use less hair dryers and let them dry naturally.
Other tools that heat the hair can also damage the hair, including curling irons, electric heating brushes, and hair straighteners.
Be careful when using a heating tool, as persistent burns to the scalp can permanently damage the hair follicle. 
Do not perm. Perm refers to chemical straightening or curling of the hair, both of which can damage the hair. Their principle is to destroy the internal structure of the hair and then reconstitute it in another way to straighten or curl the hair. This will weaken the hair and make them dull, dry and fragile.  Dry and fragile hair will gradually fall off.
Use less hair dyes and chemicals. Frequent use of chemical hair dyes can make your hair more susceptible to serious damage. Hair dyeing should be at least 4 to 6 weeks apart. Let the color dyed on the hair fall off naturally, do not bleach or dye it, so it is mild to the hair.
Do not bleach your hair. When bleaching the hair, the chemical penetrates into the surface and removes the natural pigment from the hair. This will change the hair structure and make them more susceptible to damage. Hair becomes more fragile, bleaching plus drying and styling really hurts hair. 
Don’t pull your hair too tight. Some hair styles require a very tight pull on the hair and require a rubber band or hair clip. If you do this every day, it will cause hair loss. For example, horsetails, scorpions and corn borer, which are tightly tied every day, can cause severe hair loss.  Wrap the hair tightly around the curling iron, especially the electric heating curler, which will cause more hair to fall off. 
This type of hair loss is medically known as traction hair loss and its occurrence is completely preventable. 
Actively care for the hair
Wash your hair with a mild shampoo. Wash your hair to keep your hair and scalp clean so they don’t fall into infection. Do not wash your hair every day, because shampoo will wash off the hair’s natural oils and wash it at most once every other day. As long as you use a mild shampoo, clean hair will look richer, and dirty hair will usually be flat and uncomfortable. 
Choose the shampoo that is right for your hair. A good shampoo can really make you have a healthy hair, so take a moment to find the right product for you.  To find out if your hair is slender, dry, oily or neutral, try a different product and see which one is most effective. If you have dandruff or hair dye, be sure to use shampoo specifically for these conditions. 
Enriched shampoo and conditioner with protein to fill the pores of the hair shaft, making the hair temporarily smoother and thicker, but not repairing damaged hair. 
Look at the ingredients and look for a mild shampoo. Gentle shampoo can help keep your scalp and hair healthy. Check the composition of the shampoo to see if it is mild. Avoid products containing sulfates, parabens and/or sulfonates. The first ingredient you buy is water, and the second ingredient is isethionate or glucoside. 
Mild shampoos typically contain sulfosuccinates, alkyl sulfobetaines, and amphoteric diacetates.
Silicon, polyquaternium and “guar” are good conditioner ingredients. 
Use a quality hair brush. The way the hair is combed has a great effect on the condition of the hair. Choose a soft hair brush made of natural fiber, combing from the inside out, not from the top.  Exercise as soft as possible, don’t pull too hard.
Do not comb the wet hair with a hair brush. At this time, you should use a comb. 
Massage the scalp. Massage the scalp with nourishing oils such as coconut oil, rosemary oil, lavender oil or almond oil  to increase blood flow to the scalp surface and hair follicles. The scalp will heat the skin and promote blood circulation, so that the cells in the hair follicle can get enough nutrients to maximize the growth potential of the hair. 
Massage the scalp can also help you relax and improve overall body function. 
If you are worried about hair loss, you can test if the hair really becomes sparse. If you want to know if you really have hair loss, you can do a “pull test.” Take a small bundle of hair, about 20 to 30, and hold it with your thumb and forefinger. Slowly pull it hard. If more than 6 hairs fall off at the same time, you may have hair loss problems. .
This test has not been verified, and it is important to remember that many hairs naturally fall off every day. If you think that more hair is falling off than usual, be sure to see a doctor or hair specialist.
Eat food that is good for your hair
Eat a healthy and balanced diet. To maintain your hair, scalp and good health, you need to get enough nutrients. This is a very simple common sense. Your body will be healthy and your hair will be healthy. A healthy diet with lots of vegetables and fruits may slow the rate of hair loss.  Some vitamins and minerals are described below, which are especially useful for promoting hair health and therefore prevent hair loss.
Ingest a lot of iron. Iron is an essential mineral for the human body. Heme iron is present in animal foods and non-heme iron in plant foods. Iron deficiency can cause anemia, interrupting the nutritional supply of hair follicles and possibly increasing hair loss.  In order to avoid this, you must always eat high-iron food.
Red meat, muscle and fish are rich in iron.
Green vegetables such as broccoli, spinach and kale are also good sources of iron.
Eat enough protein. If you want your hair to be strong, you can’t have no protein. Lack of protein can cause dry and fragile hair and eventually cause hair loss.  Adequate protein can provide amino acids that help strengthen hair. Although many shampoos contain protein, the protein in the diet can improve hair condition and prevent hair loss, provided that you eat enough.
Ingest protein from seafood, poultry, milk, cheese, yogurt, eggs, beans, pork tenderloin, soy, lean beef and protein bars. [twenty four]
As for vegetarians, dairy-free people and others, you can also get high quality from danbe, tofu, whole wheat bread, peanut butter, brown rice, lentils, buckwheat, nuts, gluten, beans and broccoli. Non-animal protein. 
Take vitamin C. Foods rich in vitamin C can promote the absorption of iron, try to combine high-iron and high-vitamin C foods to use iron most effectively. Vitamin C also promotes collagen synthesis, which strengthens the capillaries that supply blood to the hair shaft.  Good sources of vitamin C include:
Citrus fruits, kale, broccoli, Brussels sprouts, baked potatoes and tomatoes. 
Blueberries, blackberries and strawberries are also good sources of vitamin C.
Get enough omega 3 fatty acids. These fats keep your hair healthy and prevent your hair from becoming dry and fragile.  They are present in the scalp cells and also moisturize the hair and scalp. The body cannot produce this important fat by itself and must be taken from the diet. 
Eat deep-sea fish that contain omega 3 fatty acids such as tuna, salmon and salmon.
You can also get these fatty acids from seeds and nuts, especially flaxseed, pumpkin seeds and walnuts.
Eat biotin-rich foods. Biotin is a water-soluble B vitamin. It is especially important for hair, which lacks it and causes the hair to become weak and may speed up hair loss.  Good sources of biotin include whole grains, liver, protein, soy flour, walnuts, and yeast.
Whole grains are also rich in zinc. Zinc deficiency can cause dryness, itching and hair loss in the scalp. 
Consider taking supplements. Consider taking supplements to prevent hair loss, but be sure to ask your doctor first. Supplements that can be taken include biotin, inositol, iron, vitamin C and saw palmetto.  Although there is no evidence that they prevent hair loss, some people claim that they are useful.
Know which foods to avoid. Once you know which foods are good for your hair, you should also figure out which foods are best not to eat. The basic principles of a healthy and balanced diet apply in all situations, but there are certain substances that cause hair loss. The artificial sweetener aspartame is thought to cause hair thinning and hair loss. Food additives can also have a negative impact on hair. 
One of the substances contained in the raw protein binds to biotin, which causes biotin to be absorbed by the body. 
Be sure to get enough heat. A low-calorie diet may cause temporary hair loss. The body needs minerals and vitamins to make and maintain hair, such as the various substances mentioned above. Reducing food intake may make the body unable to access important nutrients. In addition, reducing too much heat can put a lot of pressure on the body, causing the hair to stop growing and entering a dormant or stationary phase.  Don’t do fast-acting dieting, or you will find that more than just losing weight, your hair is gone.
Receiving hair loss treatment
Know when you need medical attention. Learn to distinguish whether hair loss is a symptom of a serious illness. When there is a problem, you can seek medical attention as soon as possible. If hair loss occurs abnormally, or if you lose hair quickly at a very young age, such as adolescence or hair loss in your twenties, go to the doctor. Other symptoms to be aware of are:
Hair loss is accompanied by pain and itching, or redness and peeling of the scalp.
Beard or eyebrows have bald spots.
Females develop male pattern hair loss, abnormal growth of facial and body hair, or irregular menstruation. This may be caused by a hormonal imbalance.
Be prepared for medical treatment. Before going to the doctor, it is best to think about the symptoms you have, so that you can tell the doctor clearly. Think about when was the first hair loss, is it happening occasionally or continuously?  Also ask yourself:
Does the hair grow slowly, easily break or fall off?
Are there immediate hair loss in the family?
Learn about treatment options for male hair loss. Hereditary alopecia is the most common cause of hair loss. The most common form of hair loss in men is the hairline shifting back, roughly in the shape of an M. Although this is not a disease, but a genetic decision, the doctor can prescribe medication for you.  The two most commonly used drugs are:
Minoxidil (Luojian) is a topical medicine that is applied to the scalp to stimulate hair follicles. The concentration is 2% and 5%, and it is used once a day.
Finasteride (Baozhizhi, Baozhizhi) is an oral tablet that reduces the production of dihydrotestosterone. Dihydrotestosterone is a by-product of testosterone and is the leading cause of male pattern hair loss.  Women of childbearing age cannot be exposed to powdered or broken finasteride tablets.
Learn about treatment options for female hair loss. About one-third of women have hair loss problems. As many as two-thirds of menopausal women become sparse or have bald spots. Women rarely have problems with the hairline moving backwards, but the seams become more and more sparse, causing the hair on the top of the head to become more and more scattered.  Drugs commonly used to treat female pattern hair loss include:
Minoxidil (Luojian) is a topical medicine applied to the scalp. If taken orally, it will enter breast milk, so it cannot be used during breastfeeding.
Antiandrogen is a receptor blocker that doctors rarely prescribe.
Doctors also give iron supplements to certain women, especially those who are vegetarian, have a history of anemia or have a large blood volume. 
Don’t let your hair touch the sun for a long time.
Do not use hair sprays and other similar products that will speed up hair loss, breakage and daily wear.
Choose mild shampoos and conditioners that are gentler to the hair and improve overall condition. Do not use harsh soaps, especially those that contain deodorants. They can damage the scalp.
Celiac disease can cause hair loss. If you have this problem, it is best to consult a doctor.
Sickness (such as thyroid disease) and taking antibiotics can cause hair loss, so be sure to maintain a good physical condition in order to offset the effects of these factors on the hair.
Humans shed about 100 hairs a day.  Many hairs actually fall off when bathed and bathed. If you lose more hair than usual, even if there are no bald spots, pay attention to this problem.
When you sleep, instead of wearing your hair, it is better to tie a loose scorpion. This will turn over and over during sleep, and will not pull the hair too much.
If you have a postpartum hair loss after giving birth, don’t panic. After pregnancy, hormonal changes will change the hair and hair thickness. After the production, these hormones will gradually decrease, and naturally, there will be a phenomenon. At this time, hair loss means that the hormone level slowly returns to normal.  Hair that falls off after delivery usually re-grows within a few months. 
Put a little oil on the scalp before going to sleep. Wash with the appropriate shampoo the next morning. This promotes hair growth and makes hair stronger.
Hair loss can be a sign of illness or unhealthiness. If you are worried, especially if you have a bad diet, immunosuppression or overall discomfort, be sure to see a doctor.