This Is How Often You Should Really Change Your Toothbrush, Dentists Say

If you're not getting a new toothbrush after this many weeks, you're putting your health at risk.

Seeing as it's the first thing you do in the morning and the last thing you do at night, you tend to brush your teeth when you're at your sleepiest. So we don't blame you for not noticing that those toothbrush bristles are looking a little scraggly and perhaps even a little more yellow than they were when you first opened up the package weeks ago. But the truth is, if you're going too long without replacing your toothbrush, you could ultimately be putting your health at risk. So, how often should you be swapping your old toothbrush for a fresh one? Read on to find out, and for more hygiene tips you could probably use, This Is How Often You Should Really Be Changing Your Sheets, Experts Say.

Ideally, you'd swap out your toothbrush every six to eight weeks.

woman buys new toothbrush at store

Dentist Poonam Jain, BDS, told Best Life she recommends making the change every six to eight weeks or so. Jain adds that those who exert greater pressure while brushing should consider swapping out their toothbrush even more frequently. And for how long you should go between full body cleanings, find out How Often You Should Really Be Showering, Doctors Say

Or when you notice the bristles looking frayed.

Old, frayed toothbrush next to brand new toothbrush

Once your toothbrush's bristles begin to fray, you need to replace it, even if it's sooner than six weeks. When the bristles start to fray, it "can lead to increased trauma to the gum tissues and reduced efficacy when brushing," says co-founder of Spotlight Oral Care Vanessa Creaven, DDS.

"The nylon bristles on our brushes are designed to remove the plaque from our teeth and from under our gums. They also polish the enamel of our teeth. Over time, these bristles become curved at the edges, which makes them less effective," explains Jain. And for another change you need to make often, check out How Often You Should Really Be Changing Your Underwear.

But you shouldn't wait any longer than three months.

Toothbrush holder in the bathroom, things housekeepers hate

The Centers for Disease Control and Prevention (CDC) says you should be changing your toothbrush at least every three to four months, although there are exceptions. However, the dentists Best Life spoke with suggested swapping out an old toothbrush after three months tops to stay on the safe side. Want more up-to-date tips on your health, hygiene, and more? Sign up for our daily newsletter.

Using the same toothbrush for longer has serious consequences.

old man brushing teeth, things that would horrify your dentist

If you don't change your toothbrush frequently enough, you could be putting yourself at risk. Toothbrushes past their expiration date "can harbor bacteria, which can lead to infection, and since the bristles aren't as effective, it can lead to an influx of plaque buildup, which results in tooth decay and gum disease," says Flora Stay, DDS.

The cause of these diseases and infections is "the residue left at the base of the brush head, which may harbor bacterial or fungal growth," says Jain.

To keep your mouth healthy and infection-free, be sure to change your toothbrush at least every three months—if not more frequently. For more on this and other bad habits, check out The Things You're Doing That Would Horrify Your Dentist.

And any time you're sick, you need a new toothbrush.

toothbrush on bathroom counter
Shutterstock/Joseph Jacobs

In addition to looking out for frayed bristles, another exception to the three-month toothbrush-switching rule comes in if you're sick. If "you recently have had a cold or respiratory infection … you should replace it immediately," says Stay. And now that you've got the brushing down, read up on What Happens to Your Body When You Don't Floss Your Teeth.

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