"Sudden thinning Hair can be a symptom of anemia (low red blood cell count), hormonal issues especially related to events like pregnancy, or a thyroid disorder, which are all very common in women," says Peredo. If any of these are the case, hair loss won't be the only symptom present. With thyroid disease, you'll likely also notice changes in energy level, weight, and skin dryness, and you may experience heart palpitations. Hormonal fluctuations often cause acne, facial hair loss like in your eyebrows, and changes in your period.
What To Do: If you suspect there's something hormonal or medical at play, see your doctor for a complete physical with blood work. Your doc should be able to offer more insight into exactly what is causing the hair thinning, along with the best recommendations for treating it.
Yael Halaas, M.D., addresses thinning hair in patients with a couple of today's latest options. Platelet Rich Fibrin Matrix (PRFMP)—which is known as a PRP treatment—involves spinning samples of your own blood to release growth factors, purifying it, and injecting it into the scalp to help stimulate hair growth. "This means you're keeping your hair and decreasing thinning," Halaas explains. She also uses Smart Graft, the new minimally invasive micro-grafting technology that harvests hairs (typically from the back of head or other parts of the body) to replenish thinning areas. "Patients can expect to see results in about three months, noticeable improvement in six months, and a full head of hair growth by 12 to 14 months," says Halaas.
Related: How To Turn Off The Hormones That Cause Hair Thinning
If mom or dad have always had thinning hair, and you notice it young—as early as your late teens—it could be androgenetic alopecia, says Washington, DC plastic surgeon Michael Somenek, M.D.. "The first sign of this kind of hair loss in women is a widening of the part or the ponytail becoming smaller," says Somenek.
What To Do: Combination treatments maximize the potential for new hair growth and prevent continued loss of hair follicles, says Somenek. He likes to combine hair supplements and topical treatments like Women's Rogaine, which contains minoxidil, to help grow back patient hair. The good news: There are far more options to feel hopeful about now than there were for mom and dad, so thinning can be far better managed.