You can technically get oral herpes from sharing a drink, but you are more likely to get it from kissing or skin-to-skin contact.
Sharing a drink with someone who has oral herpes (HSV-1) poses only a small risk, because the virus doesn’t survive well outside the body and becomes inactive quickly once saliva dries. However, the risk increases if the person has an active cold sore, since fresh saliva contains more virus.
Passing a drink back and forth immediately is slightly riskier than using the same cup later, but overall, transmission through shared cups is uncommon. HSV-2 is almost never spread this way, as it typically doesn’t infect the mouth.
Herpes spreads through direct contact with a sore or through viral shedding (the release of an active virus) from the skin, saliva, or genital fluids, even without a visible sore. There are two types of herpes, HSV-1 and HSV-2. HSV-1 typically causes oral herpes, while HSV-2 causes genital herpes. However, both types can cause herpes in the mouth area or genitals.
There’s a small chance you could get oral herpes from sharing a drink if saliva or fluid from a sore gets on a glass or straw. However, it’s rare compared to kissing or skin-to-skin contact because the herpes virus doesn’t survive long on surfaces outside of the body.
You’re more likely to get herpes through close contact, like from:
- A kiss: The virus travels through saliva or skin contact around the mouth, so even brief contact can spread it, especially during an outbreak.
- Oral sex: Someone with oral herpes can pass the virus to their partner’s genitals. The reverse can happen, too.
- Shared lip balm or razors: These can carry tiny bits of saliva or skin cells from a cold sore. If you use them right after someone else, the virus could spread.
- Skin-to-skin contact: Direct skin contact can spread herpes even without exchanging fluids because of viral shedding.
- Cold sores: If you touch a herpes sore and then touch your mouth or eyes without washing your hands, you’re more likely to get or spread the virus.
Herpes spreads most easily when new blisters are forming, known as the prodrome stage, or when sores are open and moist. The prodrome stage is the time before a sore appears, when you feel burning, itching, or tingling in the mouth area.
However, you can also spread it without a visible sore since you can shed the virus through body fluids or the skin. This is known as asymptomatic shedding.
To lower your risk of getting or spreading herpes:
- Avoid sharing personal items: While there is less chance of herpes spreading outside the body, it’s still best to avoid sharing cups, utensils, razors, or lip products, especially when someone has a sore.
- Avoid touching cold sores: Don’t touch, pick, or scratch sores. Use a cotton swab to apply treatments. Wash your hands immediately if you do touch the area.
- Be careful during outbreaks: Skip kissing or oral sex when you have a cold sore, from the first tingle until the skin fully heals. Practice safe sex by using condoms or dental dams to reduce skin-to-skin contact and the exchange of bodily fluids.
- Support your immune system: Outbreaks often occur from stress, being sick, or feeling run-down. Eating well, getting plenty of rest, and maintaining healthy zinc and vitamin D levels support immune function and healing.
- Seek medical care: Ask a doctor about antiviral medications, like Zovirax (acyclovir) or Valtrex (valacyclovir), if you get frequent or painful outbreaks. Antivirals can help shorten outbreaks and lower the risk of spreading herpes.
