Waning estrogen exacerbates the situation. In youth, “estrogen is your hair’s best friend—it keeps hair in the growth phase longer, it supports a healthy follicle, and it acts as a natural counterbalance to androgens within the follicles,” Dr. Idriss says. “But as estrogen declines in menopause, that protective effect fades and you’re left with a state of relative androgen dominance.” Again, it’s not that your androgen levels are high; there’s just less estrogen around to offset them. Contributing to the imbalance is aromatase, yet another wizardly enzyme in our hair follicles. This one transforms androgens into beneficial estrogens, but “it seems to be decreased in the affected scalps of women with pattern hair loss,” notes Dr. Hausauer. But presumably if you’re on menopausal hormone therapy, that estrogen will prevent a lot of this potential hair loss, right? Unfortunately wrong: “MHT may help soften the hormonal drop that can contribute to shedding, but it does not reliably prevent or treat female pattern hair loss,” says Dr. Idriss.
Long story short: “When helpful hormones bottom out and androgens go unchecked, genetic hair loss gets unmasked,” Dr. Finney says. But it’s a gradual process, so you may not notice it right away. “It’s not: ‘My hair just fell out,’” notes Dr. Idriss. “It’s: ‘My ponytail feels thinner.’ ‘I can see my scalp more.’ ‘My hair isn’t what it used to be.’”
Marci can relate. “I never paid much attention to how much hair was in the brush or going down the drain,” she says. “What made me nervous was how much I could see my scalp.” For others, the loss may not register until even later. When Melissa Coleman, the 47-year-old beauty consultant better known as @mrs.derm, started taking oral minoxidil in advance of her tummy tuck, she was simply hoping to stave off post-op shedding. “I didn’t even notice that I had been losing my hair until I saw all this new growth coming in,” she says. “Mushroom head,” she calls it. “I suddenly had two inches of new hair sprouting all over my scalp.”
What are the side effects of oral minoxidil?
Nearly every woman I spoke to for this story has experienced the minor side effects of oral minoxidil—most commonly, excess hair on the face or body. “While studies suggest that maybe 35 to 50 percent of people get hair on their face, in my office, it’s 90 percent,” says Dr. Gendler. Still, she says, “it’s rare for a woman to tell me, ‘I can’t deal with the facial hair; I’m going off of minoxidil.’” Dr. Gendler’s experience aligns with the findings of a 2026 study of patient-reported side effects. In women taking low-dose oral minoxidil, 71.6 percent reported unwanted hair growth, mostly on the face, arms, and legs; 93.2 percent continued to take the drug.
For some, this side effect is subtle: a little extra peach fuzz along the jawline. For others, not so subtle: Dr. Idriss didn’t realize the magnitude of her facial hair until she saw a photo of herself, blown up and unretouched, in a Sephora storefront. (Her skin-care line, Dr. Idriss, is sold there.) “I was like, ‘Uh, why do I have a beard?’” Other women shared similar (albeit less cinematic) stories of hair erupting in unexpected places. Melissa and Marci, for instance, discovered newfound knuckle hairs. “So, I guess we’re shaving our fingers now,” Melissa jokes. Polly noticed dark fur blooming on her temples. It looked very “woodland creature,” she says, particularly in her lighted magnifying mirror. She now routinely dermaplanes her face and plucks any rogue hairs. “It’s been ongoing but manageable,” she says; “worth the tradeoff.”
