Due to the difference in laboratory methods, hospitals may differ in determining the normal value of female plasma testosterone, for example, some hospitals have set the normal value of female plasma testosterone at 0.7-2.1 nmol/L. When conducting the examination, it is necessary to base on the reference value of female plasma testosterone given by the hospitals and combine it with the clinic to make a judgment. Female testosterone is converted from androstenedione secreted by adrenal glands or ovaries. Testosterone has the function of enhancing physical performance, maintaining bone density and muscle strength. If testosterone levels are abnormally high in women, polycystic ovary syndrome and hyperadrenocorticism may be present. There are many reasons affecting the testosterone value of women, mainly including physiological and pathological, the former is affected by hereditary and other factors, and generally does not require special treatment, while the latter requires further examination to clarify the specific causes. If the testosterone value of a woman is out of the normal range, she should go to the hospital in time to complete the examination, make a clear diagnosis and carry out targeted treatment as soon as possible.