How to Check If Your Hair Loss Is Within Normal Limits

It can be alarming to look at your comb or at the shower drain and see a clump of hair. Not only could it clog your drain, but you may worry that it’s a sign of serious hair loss. But chances are what you’re seeing isn’t anything to be concerned about, and if you want to be sure, there are easy ways to check for abnormal hair loss at home.

The average person loses somewhere between 50 and 100 strands of hair per day, according to the American Academy of Dermatology. Yes, that’s a lot, so don’t panic if you see a few strands in your bathroom.

Hair shedding versus hair loss

And while we’re on the topic, there is a difference between hair loss and hair shedding. The AAD notes that hair shedding—or temporarily losing a little more hair than usual—is completely normal, and usually occurs after a major life stressor or body change, like losing 20 lbs. or more, giving birth, having a high fever, going off birth control pills, or caregiving for a loved one. Excessive hair shedding usually lasts for six to nine months, and then your hair growth and loss returns to normal.

Hair loss, on the other hand, is when something happens that actually stops your hair from growing, the AAD explains. Examples of this include hereditary hair loss, losing hair because of a medication like chemotherapy, using harsh hair care products, or having a compulsion to pull out your own hair. In these cases, the hair will not regrow until the cause stops—though that’s not possible in every case (like if genetics are to blame). If you have questions about the difference between hair shedding and hair loss, it may be a good idea to talk to your doctor.

That said, if you want to test your own rate of hair loss, here are two ways to check:

Pull test
For a simple at-home test, Dr. James C. Marotta suggests you take about 60 hairs between your fingers and pull a little bit as you run your fingers through your hair. It’s normal to see five to eight hairs in your hand. If you have 15 to 20 hairs, though, you could be losing more hair than normal. Marotta explains:

• “For most, 90 percent of the hair on your head is in the growing phase, while about 10 percent of your hair is in the ‘resting’ phase, meaning that 10 percent will fall out and leave room for new hair growth within a certain period of time. If you are losing more than 15 hairs per pull, it likely means more than 10 percent of the hair on your head is in the ‘resting’ phase.”

Comb test
Here’s another test to try: before shampooing, comb from the back of the top of your head forward to the front of the scalp for one minute. Do this while leaning over a lightly colored bed sheet, then count the hairs on the sheet. According to a study published in the Journal of the American Medical Association: Dermatology, you should see about 10 hairs.

Of course, there are a few caveats for both of these methods, including that these numbers are approximate and may differ between people with different types of hair. Also, we tend to lose more hair as we age, which again, is normal. But the general idea is to know what’s normal for you so you can tell when it has gotten worse.

This story was originally published on 11/17/16 and was updated on 8/28/19 to provide more thorough and current information.