If you’re getting over a stubborn cold or the flu, you may want to consider tossing your toothbrush.

“Frankly, most healthy people are probably at a very low risk of reinfecting themselves from something they’ve already really built an immunity to,” said Anne Clemons, a dentist at Cleveland Clinic. “But it’s kind of one of those maybe it’s better safe than sorry. It can’t hurt.”

Dr. Clemons said toothbrushes should be thrown away every three to four months, or sooner if the bristles are starting to fray. The same goes for electric toothbrushes. 

Some other ways to help prevent the spread of germs include keeping toothbrushes stored separately in the bathroom and making sure everyone in the house has their own toothpaste. 

Dr. Clemons notes that whether you’re sick or not, it’s important to maintain good oral hygiene. She recommends brushing your teeth at least twice a day and flossing. 

You can also use mouthwash. 

“The mouth is connected to your whole body. We can’t just kind of separate it and put it over here. If there’s inflammation or other disease happening in the mouth, it doesn’t just stay in the mouth,” she said. “We’re still learning more and more in general in medicine, but in dentistry as well, how those little things, maybe a little bit of gum inflammation, may affect your body in big ways,” she said. “It’s all connected, so the cleaner and healthier your mouth is, the better and healthier you are overall.”

Sometimes when people are sick, they may crave more sugary foods and drinks, which isn’t great for our teeth, Dr. Clemons said. She recommends trying to avoid that.

If you need cough drops, she suggests the sugar-free kind.