5 Reasons Why You're Losing Your Hair

It's true that men are more likely to lose their hair than women, mostly due to male pattern baldness (more on that later). But thinning hair and hair loss are also common in women, and no less demoralizing. Reasons can range from the simple and temporary—a vitamin deficiency—to the more complex, like an underlying health condition. In many cases, there are ways to treat both male and female hair loss. It all depends on the cause. Here are some common and not-so-common reasons why you might be seeing less hair on your head. Physical stress Any kind of physical trauma—surgery, a car accident, or a severe illness, even the flu—can cause temporary hair loss. This can trigger a type of hair loss called telogen effluvium. Hair has a programmed life cycle: a growth phase, rest phase and shedding phase. “When you have a really stressful event, it can shock the hair cycle, (pushing) more hair into the shedding phase,” explains Marc Glashofer, MD, a dermatologist in New York City. Hair loss often becomes noticeable three-to-six months after the trauma. What to do: The good news is that hair will start growing back as your body recovers. Pregnancy Pregnancy is one example of the type of physical stress that can cause hair loss (that and hormones). Pregnancy-related hair loss is seen more commonly after your baby has been delivered rather than actually during pregnancy. “Giving birth is pretty traumatic,” says Dr. Glashofer. What to do: If you do experience hair loss, rest assured that your hair will grow back in a couple of months. “It’s a normal thing and it will work its way out,” Dr. Glashofer says. Too much vitamin A Overdoing vitamin A-containing supplements or medications can trigger hair loss, according to the American Academy of Dermatology. The Daily Value for vitamin A is 5,000 International Units (IU) per day for adults and kids over age 4; supplements can contain 2,500 to 10,000 IU. What to do: This is a reversible cause of hair loss and once the excess vitamin A is halted, hair should grow normally.