Alarmist scenario: The beginnings of baldness.
More likely cause: Stress, pregnancy (typically about three months after giving birth), medications (including birth-control pills and antidepressants), or being over 40.
Reality check: “Although hair loss is a common complaint, for women under 50 it’s often likely to be temporary and due to stress or medications,” says endocrinologist Gregory Brent, a professor of medicine at the David Geffen School of Medicine at UCLA.
Rx: If hair is falling out from the top of your scalp but not the back, see a dermatologist. In some cases, minoxidil (Rogaine) can help the hair regrow. If a hormone imbalance is the cause, correcting that can help.