Epiglottitis

Written & reviewed by the BestDoctors.sg editorial team · Last updated 2 Sep 2026 · General information, not medical advice

Epiglottitis can look, at first, like an ordinary bad sore throat, but it behaves very differently. The tissue at the top of the airway becomes inflamed and swollen, and unlike a common throat infection it can worsen over hours and threaten breathing. It can affect both children and adults. Knowing the warning signs — and knowing that the throat must never be poked or examined at home — can be life-saving.

What epiglottitis is

The epiglottis is a leaf-shaped flap of tissue that sits at the base of the tongue, above the voice box. Its job is to fold down and cover the windpipe each time you swallow, so that food and drink go into the food pipe rather than into the airway. In epiglottitis, this flap and the tissues around it become inflamed and swollen.

Because the epiglottis sits right at the entrance to the windpipe, swelling here can narrow or block the airway and, in severe cases, stop breathing altogether. That is why epiglottitis is treated as an emergency rather than a routine throat problem. It can develop in young children and in adults, and once it starts, the swelling can build up quickly.

Symptoms to watch for

The symptoms often come on quickly and can worsen fast. Warning features include:

• A severe sore throat, frequently much worse than the person’s usual sore throats.
• Difficulty and pain on swallowing, so that even saliva is hard to manage.
• Drooling, because swallowing has become too painful.
• A muffled or “hot potato” voice, as though the person is speaking with something in the mouth.
• Difficulty breathing, sometimes with noisy or high-pitched breathing.
• A high fever and looking generally unwell.
• A strong preference to sit upright and lean forward — the so-called “tripod” position — because lying back makes breathing harder.

A child who is quiet, still, sitting forward and concentrating hard on breathing is especially worrying and needs emergency help without delay.

Why it is dangerous

The danger in epiglottitis comes from how quickly the airway can swell shut. As the epiglottis enlarges, the opening to the windpipe narrows, and breathing can go from difficult to blocked in a short space of time. This is why staying calm and upright and getting emergency help is so important — distress, crying and struggling can worsen breathing.

It is also why the throat must never be examined at home. Trying to look inside the mouth, holding down the tongue with a spoon or finger, or laying the person flat can irritate the already swollen tissue and trigger complete blockage of the airway. Assessment of the throat is done only by a hospital team who are ready to protect the airway immediately if needed.

Causes and who is at risk

The usual cause of epiglottitis is a bacterial infection of the epiglottis and surrounding tissues. Less commonly, it can follow a burn or an injury to the throat — for example from swallowing something very hot, or from a direct injury to the area.

Historically, one particular bacterium was a common cause in young children. Widespread childhood vaccination against Haemophilus influenzae type b (the Hib vaccine) has made that cause much rarer, which is one important reason for keeping up with routine childhood immunisations. Even so, epiglottitis has not disappeared: it can still occur in children, and in adults it is now seen relatively more often. Anyone with a very sore throat and difficulty breathing should be taken seriously regardless of age or vaccination history.

How it is diagnosed and treated

Epiglottitis is assessed urgently in hospital. In Singapore this means going to an A&E, where the team — often including ENT (ear, nose and throat) specialists and anaesthetists — will focus first on protecting the airway. Investigations are carried out carefully and gently so as not to disturb the swollen epiglottis, and any examination of the throat is done in a controlled setting where the airway can be secured at once if it starts to close.

The first priority is always breathing. If the airway is at risk, the team may pass a breathing tube to keep it open, and in some cases the person is looked after in an intensive care setting until the swelling settles. Once the airway is safe, the underlying infection is treated with antibiotics, along with supportive care such as oxygen and fluids. Most people recover well when the condition is recognised and treated promptly — which is exactly why speed matters so much.

Prevention

The most important preventive step is keeping children up to date with their routine immunisations, including the Hib vaccine, which has greatly reduced one common cause of epiglottitis in young children. In Singapore, childhood vaccinations are part of the national schedule, and parents unsure about their child’s immunisations can check with their family doctor or polyclinic. Prompt medical attention for a severe sore throat with breathing difficulty is the other key protection, because early treatment prevents the airway from reaching a critical point.

When to seek emergency help

Call 995 or go straight to A&E if there is a severe sore throat together with any difficulty breathing, drooling, a muffled voice, or a child sitting forward and struggling to breathe. While waiting for help, keep the person calm and upright, do not attempt to examine the throat, do not put anything in the mouth, and do not lay them flat. It is always safer to be assessed urgently and reassured than to wait and see.

Common questions

Is epiglottitis the same as a normal sore throat?

No. Most sore throats are mild and settle on their own. Epiglottitis is a rapid swelling at the entrance to the windpipe that can block breathing, so it is an emergency rather than a routine infection.

Can adults get epiglottitis, or is it only a childhood illness?

Both children and adults can develop it. Since childhood Hib vaccination became widespread, it is now seen relatively more often in adults, but any age can be affected.

Why should I not look inside the throat myself?

Examining or poking the swollen throat, or laying the person flat, can irritate the epiglottis and cause the airway to close completely. Throat examination is done only by a hospital team ready to secure the airway.

Does the Hib vaccine mean my child cannot get epiglottitis?

The Hib vaccine has made one common bacterial cause much rarer, but it does not remove every possibility. Any child with a severe sore throat and breathing difficulty still needs emergency assessment.

Why does the person want to sit up and lean forward?

Sitting upright and leaning forward helps keep the swollen airway as open as possible. This “tripod” position is a warning sign, and the person should be allowed to stay in whatever position helps them breathe.

Related guides

• Sore throat
• Croup
• Difficulty swallowing

Sources

• KK Women’s and Children’s Hospital
• HealthHub
• NHS
• American Academy of Otolaryngology