Upper Respiratory Infection in Bangkok: What Needs Treatment and What Needs Time
How Doctor Bangkok manages the common cold, sinusitis and cough without reaching for antibiotics that do not help.
Clinically reviewed by Dr. Ponlawat Pitsuwan, Physician, Doctor Bangkok
Upper respiratory infection (URI) is the medical term for the common cold and related viral illnesses of the nose, throat, and sinuses. Most cases are viral, last 7 to 10 days, and do not benefit from antibiotics. A minority develop bacterial complications (sinusitis, otitis media, strep throat) that need targeted treatment. At Doctor Bangkok we assess symptoms, rule out flu, COVID, strep and dengue where appropriate, treat bacterial complications when they appear, and provide clear advice about what self-care actually works.
From the clinic: Upper respiratory infection is the most over-treated diagnosis in primary care. People walk in expecting antibiotics and are surprised when the clinician explains that the infection is viral and the antibiotic would neither shorten the illness nor reduce transmission. What they actually need is symptom control, time, and a plan for when to come back if things change. The minority who genuinely develop bacterial complications are easy to identify at a second visit, and treating them then is far better than treating everyone up-front.
What a URI actually is
URI is viral inflammation of the upper respiratory tract caused by rhinoviruses, coronaviruses, adenoviruses, respiratory syncytial virus (RSV), influenza and others. Symptoms are sore throat, runny or blocked nose, cough, sneezing, mild fever, and general unwellness. Peak symptoms are usually at days 3 to 5, with gradual resolution over 7 to 10 days. Post-viral cough can persist for 2 to 3 weeks even after other symptoms resolve. The illness is contagious for the first 2 to 3 days and transmits by droplets and hand contact. Our page on flu treatment covers the influenza-specific version, and sore throat treatment covers pharyngitis.
| Typical viral URI | Bacterial complication |
|---|---|
| Runny nose, sore throat, cough | Facial pain, purulent discharge |
| Peak days 3 to 5 | Worsening after day 5 |
| Mild fever or none | High fever |
| Settles by day 10 | Symptoms beyond 10 days |
| Self-care only | Targeted antibiotics |
| No red flags | Chest pain, shortness of breath |
Self-care that actually works
The evidence-based self-care for URI is straightforward: rest, fluids, paracetamol or ibuprofen for pain and fever, saline nasal spray or irrigation, honey for cough in adults and children over 1 year, and throat lozenges. Decongestants (pseudoephedrine, oxymetazoline) help nasal congestion short-term but should not be used for more than 5 days because of rebound. Cough suppressants have limited evidence but are sometimes useful at night. Antibiotics do not help viral URI and should not be requested for a runny nose. Vitamin C at modest doses has weak evidence for reducing illness duration; zinc started within 24 hours may shorten cold symptoms slightly.
When a URI becomes something more
Most URIs resolve, but some progress to bacterial complications that warrant treatment. Sinusitis is suggested by facial pain and pressure, purulent nasal discharge, and symptoms beyond 10 days or worsening after initial improvement (double-worsening). Otitis media presents with ear pain and fever in a child or adult with a recent URI. Strep throat is distinguished by tonsillar exudate, fever, tender neck nodes and absence of cough. Pneumonia presents with productive cough, shortness of breath, chest pain, fever, and sometimes abnormal chest examination findings. Each has its own treatment and is diagnosed on the features present, not on gut feeling.
When to see a doctor
Book same-day for fever above 38.5 C beyond 3 days, severe sore throat with inability to swallow, ear pain with fever, facial pain or pressure with purulent discharge beyond 10 days (sinusitis), productive cough with chest pain, shortness of breath, wheezing, or symptoms that worsen after initial improvement. Seek emergency care for difficulty breathing at rest, chest pain, high fever with confusion, severe neck stiffness, or any sign of severe illness in infants or elderly patients. These suggest complications or secondary infection and need assessment beyond self-care.
Red flag: If red-flag symptoms appear, do not wait. Book same-day or present to the nearest emergency department as described above.
Prevention and early detection
Handwashing is the single most effective prevention for URI transmission. Avoiding touching eyes, nose and mouth, covering coughs, and staying home when unwell reduce community spread. Annual influenza vaccination is recommended by WHO for high-risk groups and useful for anyone travelling or working in high-contact settings; COVID vaccination reduces severity and hospitalisation. Masks in crowded indoor settings during flu and COVID peaks are effective. Zinc and vitamin C have weak but non-zero evidence for reducing cold duration; they are not a substitute for rest and fluids. Get vaccinated against flu each year if you are in Thailand during the season.
Summary
Upper respiratory infection is the prototype of a condition where doing less is doing more. Symptom control, time, and a return plan if things change treat the vast majority of cases. The minority that develop bacterial complications are then treated with the right antibiotic for the right diagnosis. As Dr. Pitsuwan puts it: “Most colds need tissues, not pills. The art of primary care is knowing which cold is not a cold.” Doctor Bangkok runs same-day rapid testing and assessment from our Sukhumvit clinic.
Frequently asked questions
Should I take antibiotics for a cold?
No. Antibiotics do not treat viral URI, do not shorten illness, and drive resistance. Antibiotics are for bacterial complications (strep, sinusitis, pneumonia) when they are confirmed.
How long does a cold last?
Typically 7 to 10 days with peak symptoms at days 3 to 5. Post-viral cough can linger 2 to 3 weeks.
What actually helps symptoms?
Rest, fluids, paracetamol or ibuprofen, saline nasal spray, honey for cough (adults and over 1 year), short-term decongestants. Throat lozenges and warm drinks for throat discomfort.
When is my URI actually something worse?
Worsening after initial improvement, fever beyond 3 days, facial pain with purulent discharge beyond 10 days, ear pain, shortness of breath, or productive cough with chest pain. Any of these deserve review.
Can I catch the same cold twice?
There are over 200 viruses causing cold symptoms, so it is possible to have another URI shortly after the first. Immunity to each virus strain is usually durable for that specific virus.
Is there a test for cold viruses?
Rapid tests exist for flu, COVID, RSV, and some other respiratory viruses. We use them when the diagnosis will change management (for example, oseltamivir for early flu in high-risk patients).
Sources
- Centers for Disease Control and Prevention. Common cold. cdc.gov.
- NICE. Common cold: antimicrobial prescribing. nice.org.uk.
Upper respiratory infection, URI, common cold, acute rhinitis, viral pharyngitis, viral sinusitis, post-viral cough, rhinovirus, coronavirus, adenovirus, respiratory syncytial virus, RSV, influenza, sinusitis, acute bacterial sinusitis, otitis media, strep throat, community-acquired pneumonia, paracetamol, ibuprofen, pseudoephedrine, oxymetazoline, saline nasal irrigation, honey for cough, zinc, vitamin C, influenza vaccine, hand hygiene, NICE URI guidance, Dr. Ponlawat Pitsuwan, Doctor Bangkok.