High testosterone among women is usually caused by an increase in age, hormonal imbalances involving the ovaries or adrenal gland, or other disorders.
For age, as women get older, their estrogen levels decrease and testosterone levels increase. This can cause hair growth in new areas, aggression, and high blood pressure since tesosterone is associated with insulin levels. This usually happens in the woman's late thirties to early 50's as every woman is different. In some rare cases, women as young as their early twenties can have high testosterone levels, but this is usually caused by a lifestyle of excessive exercise and obviously supplemental use of products not intended for women (there are some supplements and medication that women can't take because it increases testosterone).
In the case of more rare things like hormonal imbalances and disorders, women can sometimes be treated for this with certain estrogen inducing or progesterone inducing medications to lower testosterone levels.
Likewise, this can happen in males as well, but with estrogen being the higher level instead of testosterone. For men however, this causes lower sex drive and less aggression.
Unfortunately, yeah. May be caused by hormonal imbalance and usually creeps up gradually at the age of 30
Yeah, unfortunately. :/