A woman’s lack of hair down there is related to genetic factors, hormone levels and damaged hair follicles. 1. Genetic factors: not growing pubic hair may be caused by chromosomal abnormalities, which is a physiological phenomenon. 2. Hormone level: When women are in puberty, the hormone secretion is insufficient and the pubic hair follicles are not sensitive to androgen, so the phenomenon of sparse pubic hair or not growing pubic hair will occur. Generally during pregnancy, pubic hair will grow under the stimulation of hormones. Hypothyroidism, or taking a large amount of glucocorticoids, can also lead to changes in the body’s hormone levels and not grow pubic hair. 3. Damaged hair follicles: Localized trauma to the vulva, skin grafts, or lesions on the vulva and removal of the vulvar skin can lead to damaged hair follicles and no pubic hair. If you just don’t grow pubic hair, there is no other abnormal reaction, and breast development, sex life and fertility are not affected, then you don’t need to care too much and don’t need to be treated. If it is related to a disease, the cause can be clarified and then treated.