Sudden Facial Hair Growth in Women: Causes and When It’s Urgent
Most sudden facial hair in women has a common cause, but fast-spreading hair or male-type changes need an urgent check. Here is how to tell the difference.
Causes & diagnosis
Hirsutism means coarse, dark hair growing in a male-like pattern, such as on the chin, upper lip, chest or stomach. It is common, affecting roughly 5 to 15 in 100 women, and usually has a hormonal cause. These articles explain why it happens, how doctors diagnose it and when hair growth is a sign to get checked quickly.
Normal Testosterone Levels in Women: Chart by Age
A chart of normal total and free testosterone levels in women by age, how to convert units, why the test method matters and what a high result means.
Insulin Resistance and Facial Hair: How Blood Sugar Drives Hirsutism
High insulin raises androgens and lowers SHBG, which can worsen hirsutism. Here is how it is tested and which treatments actually change hair growth.
Non-classic CAH (NCAH): The Hirsutism Cause Doctors Often Miss
NCAH is an inherited adrenal condition that mimics PMOS. Learn the 17-OHP test cutoffs, who should be tested, what it means for pregnancy and how it is treated.
Hirsutism After Stopping Birth Control: Why Hair Comes Back
Stopping the pill can reveal hirsutism it was hiding. Here is what changes, when, and how to get a reliable diagnosis.
Hirsutism in Pregnancy and After Birth: What’s Normal
Extra hair in pregnancy is usually normal and fades after birth. Here are the red flags, and which treatments to pause or keep.
Hirsutism Statistics 2026: How Common It Is and What Causes It
A citable hub of hirsutism statistics: prevalence, ethnicity, causes, PMOS, Ferriman-Gallwey cutoffs, mental health impact, treatment data and our 2019 survey.
Idiopathic Hirsutism: Unwanted Hair With Normal Hormones
Idiopathic hirsutism means male-pattern hair growth with normal hormone levels. Here is what causes it, how doctors diagnose it and which treatments work.
Is My Facial Hair Normal for My Ethnicity? What Doctors Consider
Hirsutism cutoffs differ by ancestry. See the Ferriman-Gallwey thresholds doctors use for different populations, why studies disagree and what it means for you.
Is Hirsutism Hereditary? What Runs in Families and What Doesn’t
PMOS and idiopathic hirsutism run in families, and non-classic congenital adrenal hyperplasia is directly inherited. Here is what that means for you, your siblings and your daughter.