These symptoms should not be treated with home remedies while waiting to see whether they improve.
Call emergency services immediately if someone has significant difficulty breathing or appears to have an obstructed airway. In Vietnam, the national ambulance emergency number is 115.
Keep the person as calm and comfortable as possible while help is arranged. Do not force food, drinks, or tablets into the mouth of someone who is struggling to breathe or swallow.
Do not attempt to inspect deep inside the throat or use objects to press down the tongue if a serious airway problem is suspected. Such actions may worsen distress and delay emergency treatment.
Several conditions can cause breathing difficulties in someone with throat symptoms. Severe inflammation, an allergic reaction, a deep neck infection, or an infection affecting structures near the voice box may all require urgent assessment.
It is not possible to determine the cause reliably from symptoms alone. The immediate priority is protecting breathing and obtaining professional care.
3. Warning Sign Two: Inability to Swallow Saliva
Painful swallowing is common in many throat infections. However, being unable to swallow saliva is substantially more concerning.
A person who cannot swallow may begin drooling because saliva accumulates in the mouth. They may refuse to drink, spit repeatedly, or appear frightened by the prospect of swallowing.
This can occur when swelling or pain is severe, including in some cases of peritonsillar abscess or other infections involving deeper tissues around the throat.
The inability to swallow fluids also creates a risk of dehydration. If the problem persists, the person may become increasingly weak, dizzy, or unable to maintain adequate fluid intake.
Inability to swallow saliva, particularly when accompanied by drooling, breathing difficulties, a muffled voice, or rapidly worsening symptoms, warrants emergency medical evaluation.
Do not try to force water or medication down the person's throat. If swallowing is impaired, attempting to drink may increase the risk of choking or aspiration.
A healthcare professional can assess the airway, examine the throat safely, and determine whether imaging, intravenous fluids, antibiotics, drainage of an abscess, or other treatment is needed.
Children deserve particular attention because they may have difficulty explaining what they feel. A child who is drooling unusually, refusing to swallow, sitting forward to breathe, or appearing severely unwell should be assessed urgently.
The important distinction is between ordinary discomfort while swallowing and an actual inability to manage saliva or fluids.
4. Warning Sign Three: High or Persistent Fever
Fever is a common response to infection. It can occur with viral illnesses, bacterial infections, and several other medical conditions.
A fever alone does not establish that an infection is bacterial or that antibiotics are required. The temperature must be considered alongside other symptoms and the person's overall condition.
Nevertheless, a high or persistent fever can be a reason to seek medical evaluation, particularly when it is accompanied by worsening throat pain, marked weakness, dehydration, or other concerning symptoms.
In adults, a temperature around 103°F (39.4°C) or higher deserves prompt medical advice, especially if the person feels seriously unwell. Lower temperatures can also be concerning when other warning signs are present.
Seek urgent medical attention if fever occurs with:
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Confusion or difficulty staying awake.
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Significant breathing problems.
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Severe headache with neck stiffness.
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Inability to swallow fluids.
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Very little urine, fainting, or other signs of substantial dehydration.
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Rapidly spreading swelling or redness.
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A rapidly worsening general condition.
The urgency may be greater for infants, older adults, people with weakened immune systems, and those with serious underlying medical conditions.
In young infants, fever should be assessed according to age-specific medical guidance. A temperature of 38°C (100.4°F) or higher in a baby younger than three months requires immediate medical evaluation.
A fever that persists for several days, returns after an initial improvement, or occurs alongside a new rash may also need assessment. The precise significance depends on the person's age, history, and accompanying symptoms.
Rather than focusing on one number alone, consider whether the person is alert, breathing comfortably, able to drink, and improving or deteriorating over time.
5. Warning Sign Four: Swelling in the Neck
Swollen lymph nodes are common during infections. Lymph nodes are part of the immune system, and those near the jaw and neck may become tender when the body responds to an infection in the throat or surrounding areas.
Mild tenderness and swelling can occur with ordinary viral illnesses and are not necessarily dangerous.
The concern increases when swelling develops rapidly, becomes extensive, is associated with redness spreading across the neck, or causes difficulty moving the neck, swallowing, or breathing.
Deep neck infections are uncommon but can become serious because the tissues and spaces in the neck lie close to important structures, including the airway and major blood vessels.
Possible symptoms include increasing neck pain, swelling beneath the jaw, fever, difficulty swallowing, a muffled voice, and reduced ability to turn the head.
A rapidly enlarging swelling or neck swelling associated with breathing or swallowing difficulty requires emergency assessment.
Other forms of neck swelling may develop more slowly and have different causes, including enlarged lymph nodes, salivary gland problems, thyroid conditions, or noninfectious disorders. A clinician can determine which explanation is most likely.
Avoid squeezing, repeatedly pressing, or attempting to drain a swollen area at home. Doing so can increase irritation and delay appropriate treatment.
A small, tender lymph node during a mild respiratory infection may improve as the illness resolves. A lump that continues to enlarge, remains present after the infection has passed, feels hard or fixed, or is accompanied by unexplained weight loss or night sweats should be assessed by a healthcare professional.
The pattern and duration of swelling matter just as much as its size.
6. Warning Sign Five: Symptoms That Suddenly Worsen
Many uncomplicated sore throats begin to improve within several days. The exact duration varies according to the cause, but improvement over time is generally reassuring.
A different pattern deserves attention: symptoms that worsen significantly after initially improving.
For example, someone may develop a mild sore throat and cold symptoms, begin to recover, and then experience renewed fever, increasing pain, or new swelling.
This does not automatically mean a dangerous complication has developed. However, it can indicate a secondary infection or another condition that requires assessment.
Other concerning patterns include severe pain that is much worse on one side, new difficulty opening the mouth, a change in the voice, or pain that appears disproportionate to the visible throat irritation.
A peritonsillar abscess is one possible cause of severe one-sided throat pain. It involves a collection of pus near a tonsil and can cause swelling, fever, difficulty swallowing, and a muffled voice.
Other infections may affect deeper tissues of the neck or structures involved in breathing and swallowing.
If symptoms are rapidly worsening, seek urgent medical advice rather than waiting for a routine appointment. If breathing becomes difficult or saliva cannot be swallowed, seek emergency care.
Persistent throat symptoms also deserve attention when they do not follow the expected course of an ordinary infection. A sore throat lasting longer than about a week without clear improvement may warrant medical assessment, especially if it is severe or accompanied by fever.