High testosterone may be caused by certain diseases, which may lead to endocrine disorders, increased androgens, and possible hair loss. 1. High testosterone in women: High testosterone in women is considered to be related to polycystic ovary syndrome, adrenocortical hyperplasia, tumors, hirsutism in women, medications and other factors. When the body has high testosterone, there will be endocrine disorders, which may trigger menstrual irregularities, hair loss and other symptoms. 2. High testosterone in men: high testosterone in men is considered to be related to idiopathic male precocious puberty, testicular tumor, familial male precocious puberty, idiopathic hirsutism, adrenocortical hyperplasia and other factors. High testosterone in men may also lead to massive hair loss. In addition to high testosterone causing hair loss, patchy baldness, resting alopecia, and physical irritation, are also major causes of massive hair loss. It is recommended to go to the hospital for a checkup to find the cause of hair loss and treat it with the advice of your doctor.