Female hair loss is totally bad news for women who love beauty. Why do they lose a lot of hair even though they usually do enough maintenance and care? What are the causes of hair loss in women? The following together to understand. The most important thing is to find the cause of your hair loss, and then to carry out specific conditioning for your cause, in order to completely treat hair loss and return you to a dense hair. 1, thyroid disease Too much or too little thyroxine secreted by the thyroid gland can disrupt the hair growth cycle. Hair loss is often not the only symptom of thyroid disease, it is usually accompanied by weight gain or loss, sensitivity to cold or heat and changes in heart rate. 2. Polycystic ovary syndrome Women with this disease suffer from chronic sex hormone imbalance and excess androgens, which manifests itself as excessive facial and body hair, while the hair becomes thinning. It can also lead to ovulation problems, acne and weight gain. Sometimes, thinning hair is the only symptom of the disease. 3. Baldness The body’s immune system mistakenly attacks healthy hair follicle cells, which can lead to patchy hair loss. In most cases, the hair will grow back within six months to a year. 4, mossy fungus This disease is caused by a fungus and has a more typical pattern of hair loss – itchy scalp, red, rounded areas of hair loss, and a scaly scalp. The disease is contagious, so family members of the patient should also be examined. 5. Childbirth Some women have denser hair during pregnancy, thanks to changes in sex hormone levels, which prolong the survival of the hair. However, after childbirth, sex hormone levels return to normal and those hairs will fall out quickly, a condition that in some cases takes two years to recover. 6, drugs A little-known side effect of birth control pills is hair loss. Ovulation-inhibiting drugs can make some women’s hair thinning, especially those with a family history of hair loss. In addition, anticoagulant drugs, drugs for high blood pressure, heart disease, rheumatism and depression may also cause hair loss. 7, weight loss If you lose weight quickly by dieting, you are prone to hair loss. The hair will grow back when the diet is restored to a healthy level. If the diet has too little protein or too much vitamin A, it can also lead to hair loss. 8.Anti-cancer treatment Whether it is radiotherapy or chemotherapy, it will lead to hair loss. The hair will grow back after the treatment is discontinued. 9.Extreme stress Severe illness or major surgery, massive blood loss, and extreme negative emotions can cause a person to lose half or even all of their hair, possibly for 6 to 8 months.