Foaming at the mouth happens when excess fluid in your mouth or lungs mixes with air, causing froth to appear. This symptom can be caused by several serious health conditions.
What does white foamy saliva mean?
Unexpected froth or foam coming from your mouth is a rare and serious symptom. If you see it, you should call 911 or your local emergency services and get emergency medical assistance right away.
Some health conditions can interrupt a person’s ability to swallow, causing saliva to pool in the mouth and become foamy. In other cases, excess fluid in the lungs can mix with air and create foam that comes out of the mouth.
This article looks at four conditions that can cause foaming at the mouth.
Opioids are substances that relieve severe pain. They work by acting on specific receptors in your brain and nerves.
Opioid toxicity or overdose is a medical emergency. It happens when opioids stop your body from being able to breathe. This can result in foaming at the mouth.
Overdose can happen in situations such as:
- taking too much of a prescription opioid medication or drug
- taking substances that have been laced with fentanyl without your knowledge
- mixing opioids with other substances such as alcohol or benzodiazepines
Prescription opioid medications include:
Prescription opioids are mainly used to treat pain that doesn’t respond to other medications. These medications are important for managing serious pain, but they’re known to have many side effects, including the risk of developing a tolerance to or dependence on opioids.
Opioids are also found in the illegal drug supply. Some opioids, such as heroin, are only available illegally. Others, like fentanyl, are used in specific healthcare contexts but are also produced and sold illegally.
Many drugs sold illegally are laced with the opioid fentanyl, which can lead to an unexpected opioid overdose.
Opioid overdose symptoms
Opioid overdose can cause foaming at the mouth because the overdose affects your lungs. When breathing stops or slows, fluid gathers in your lungs. This fluid can mix with air and come out of the mouth like a foam.
Common symptoms of opioid overdose include:
- small pupils
- loss of consciousness
- weak, slow, or stopped breathing
- gurgling or choking
- cold or clammy skin
- discolored or blue lips or nails
What to do if someone is having an opioid overdose
If you suspect someone is having an opioid overdose, call 911 or your local emergency services. A medication called Narcan (naloxone) can help reverse opioid overdoes.
If naloxone is available, it should be administered. Turn the person onto their side to prevent choking and talk with them to keep them awake until medical help arrives.
Naloxone can save lives
Naloxone, also known as Narcan, is a medication that helps reverse opioid overdose. If someone in your life may be at increased risk of opioid overdose, the
Many pharmacies and community programs distribute naloxone. In many states, no prescription is necessary to get naloxone, and there may be free or low cost options to get naloxone in your area.
In addition, many public health departments and harm reduction programs offer naloxone training. This training teaches you when and how to administer naloxone.
Resources such as Next Distro provide information on naloxone access in every state and can ship naloxone by mail.
A seizure that’s caused by a fever is called a febrile seizure. This type affects young children more often than adults.
Febrile seizure is fairly common, affecting up to
Symptoms of tonic-clonic seizure include:
- a headache or strange feeling before the seizure, known as prodrome
- crying out
- stiffening of the body
- turning pale or blue
- eyes rolling back into the head
- losing consciousness
- frothing at the mouth or drooling
- convulsions, or jerking of the arms and legs
- temporary loss of bladder control
What to do if someone is having a seizure
If someone appears to be having a seizure:
- Help ease them to the ground if needed.
- Put a soft flat object under the person’s head for cushioning.
- Do not move the person having a seizure unless it is absolutely necessary. Instead, move sharp or potentially dangerous objects out of the way.
- Remove eyeglasses and loosen tight clothing around the neck.
- Do not put anything in the person’s mouth or offer food or water.
- When jerking movements stop, gently turn the person to their side.
- Keep track of how long the seizure lasts.
- Stay with the person until they are fully awake.
Febrile seizures usually don’t cause lasting effects for a child, but it is important to contact a doctor when a seizure occurs.
Some people with known seizure conditions have a care plan in place and may not need emergency care. Talk with the person to explain what has happened.
Call for emergency medical help if:
- a seizure lasts longer than
- the seizure causes an injury
- the person has never had a seizure before or has another medical condition, such as diabetes or pregnancy
- the seizure happens in water
- the person has trouble regaining consciousness
Foaming at the mouth is one of the most characteristic symptoms of rabies. This happens because the virus affects the nervous system, making swallowing difficult.
Often, the first symptoms of a rabies infection include itching or tingling around the bite and flu-like symptoms such as:
When symptoms progress, a person or animal may begin to foam at the mouth. Other advanced symptoms include:
- agitation or difficulty staying still
- muscle spasms
- extreme weakness
- difficulty swallowing
How does rabies spread?
The rabies virus is found in the saliva of infected animals. The condition can also be spread by saliva from an infected animal getting into your eyes, nose, mouth, or a scrape or wound on your body. An infected animal may not have any visible symptoms.
Which animals carry rabies?
Many animals can carry rabies. In the United States, some common carriers of the rabies virus include:
Raccoons often carry the rabies virus. However, according to
If you come into direct contact with a bat, or wake up and find a bat in your room, you should call 911 or your local emergency services or go to the emergency room. If a bat bites or scratches you, the wound may be too small to see.
In the United States, most pet dogs are vaccinated against rabies. But if you’ve been bitten by a dog and don’t know the dog’s vaccination history, it’s important to get emergency care to prevent rabies.
If an animal bites you, or you come into contact with an animal that could be carrying rabies, it’s important to get checked out by a doctor right away. You can avoid potential infections or complications by getting prompt medical care.
What to do you if you may have been exposed to rabies
If you’ve been bitten by an animal or you think you’ve been exposed to rabies, call 911 or your local emergency services or go to the nearest emergency department.
Clean your wound well with soap and water and cover it with a bandage. At the hospital, a doctor will help determine whether you need treatment to prevent rabies.
The rabies vaccine stops the rabies virus from causing an infection. Once symptoms start, there is no way to treat rabies, and the infection is usually fatal.
Early treatment is the only way to prevent the infection, so it’s important to get medical care right away if you think you’ve been exposed.
Poisoning happens when you’re exposed to a substance that harms your body.
Symptoms of poisoning
Foaming at the mouth can be a symptom of poisoning. Other possible symptoms can include:
- difficulty breathing
- dry mouth
- vomiting or diarrhea
- a rash on your skin or around your mouth
- pupils that are very large or very small
To prevent accidental poisoning, it’s important to follow instructions on household products and medications and to store these items safely out of the reach of children.
What to do if a person may have been poisoned
Poisoning can be very serious and even life threatening. Depending on the cause and symptoms, emergency care may be needed.
If you think someone has been poisoned and they are alert and awake, call the National Poison Control Centers at 800-222-1222.
If the person is unconscious, having trouble breathing, or has other serious symptoms, get emergency medical help by calling 911 or your local emergency number.
The causes of foaming at the mouth are very specific and require unique treatment methods:
- An opioid overdose can be treated with naloxone and emergency medical care.
- Tonic-clonic seizures can be treated with antiepileptic medications, surgery, or other medical care, depending on the cause.
- Rabies can be prevented with a series of vaccines.
- Poisoning may require hospital treatment, depending on the cause, level of exposure, and symptoms.
Foaming at the mouth can be a symptom of a serious medical condition.
If you experience foaming at the mouth, or see someone with frothy saliva, get emergency medical help immediately.
A person who routinely has seizures may have a care plan in place and may not need hospital care every time they have a seizure. But if you’re unsure, it’s better to err on the side of caution and call for help.