Everyone loses hair at one time or another throughout the day, but not all hair loss requires medical attention. So how many hairs per person per day is normal and how many hairs need medical attention? Here is a very simple test to diagnose whether your hair loss is pathological or normal at home. Wash your hair: This is the simplest test. First, wash your hair once at around 9pm the day before the test (no need to count). The next day, wash your hair again at the same time, using a basin. After washing your hair, do not pour out the water first, collect all the hair floating on the water (if you wash your hair twice, collect it twice), and then count the number of hairs that fall out. Some studies show that 80% of the hair loss in a day occurs during the washing process, so to be more accurate, divide the number of hair loss by 80% to get a preliminary estimate of the number of hair loss per day. For example, if you collect 50 hairs from the basin, then the number of hairs you lost that day is approximately 50/0.8 ≈ 62. How many hairs per day is normal? The number of hair loss is divided into four grades, corresponding to different situations: 1.0-20 roots: perfect hair The hair loss of no more than 20 roots per day indicates that your hair is very healthy, well maintained, has a good hair gene, and also indicates that your body is in a very healthy state, with good sleep and mental state, which needs to be continued! 2.21-50 hair: excellent hair quality If you lose less than 50 hairs a day, your hair is in a healthy state. 50 hairs together looks quite a lot, but there are 100,000 hairs in a person, 50 hairs is 0.05% of the ratio, and there may be 0.1% of new hairs every day, which means you lose 50 hairs, and at the same time there may be nearly 100 hairs growing out. So your situation is also healthy. 3. 51-100: Hair loss crisis More than 50 hairs, this is something to be aware of. Now your daily hair loss and daily hair growth may be just “break even”. This is an alarm for your health, excluding genetic factors, there may be some health problems, such as whether there are late nights, greasy diet, mental stress, dieting and other phenomena, if not pay attention to the amount of hair loss may continue to increase. 4, more than 100 roots: severe hair loss More than 100 roots of hair loss per day, so horrible! Looking at the dense hair floating on the surface of the water you will certainly be very panic in your heart. The number of hair loss per day has exceeded the number of new growth, so the development of the hair will certainly be less and less, and even within a few years will fall out. Generally speaking hair loss is so serious that it is not only due to physical health and lifestyle, but also due to genetic or hormonal changes, or mental stress, heavy anxiety, or in more serious cases, some disease may have occurred in the body: such as anemia, abnormal thyroid function, immune system decline, etc. Anyway, what we need to do now is to find and remove the cause and seek some correct treatment immediately.