Cough doctor Seoul: find the cause, treat it right

When to see a cough doctor in Seoul

A cough is the body's way of clearing the airways, and after a cold it can linger for three weeks or more even as you recover. Seeing a cough doctor in Seoul makes sense when the cough is severe, comes with fever or breathlessness, keeps you awake, lasts longer than three weeks, or when you have asthma, diabetes, heart disease, a weakened immune system or are pregnant.

At VEI Clinic, Dr. HyunSung Park, a board-certified internal medicine specialist, listens to your chest, checks your temperature and oxygen level, and asks about how the cough started, what you are coughing up, and who around you is sick. That history usually points clearly toward the cause.

We also ask about smoking or vaping, reflux, nasal drip, new blood pressure medicines (some cause a dry cough) and exposure to fine dust, because these explain many coughs that linger long after an infection has cleared.

Cold, flu, COVID, bronchitis or pneumonia?

Colored mucus on its own does not mean a bacterial infection. Its color reflects inflammation, which also happens with viruses.

• Common cold: gradual start, runny nose, sore throat, mild cough, little or no fever; improves within about 7 to 10 days
• Influenza: sudden high fever, chills, body aches, headache and exhaustion, with a dry cough
• COVID-19: overlaps with both; may include loss of smell or taste; testing is the only reliable way to tell
• Acute bronchitis: chest cough, often with mucus, lasting up to three weeks after a cold; usually viral
• Pneumonia: fever, fast breathing, shortness of breath, chest pain when breathing in, feeling very unwell; may need a chest X-ray

Flu and COVID testing, and why timing matters

Rapid antigen tests for influenza and COVID-19 give results within minutes and are most accurate in the first few days of symptoms. A positive flu result within about 48 hours of symptom onset matters because antiviral medicine such as oseltamivir works best when started early, especially for people at higher risk of complications.

A negative rapid test does not completely rule out infection, particularly very early or late in the illness. The doctor will interpret results alongside your symptoms and may advise retesting or staying home if you are likely contagious.

If your test is positive, we will explain how long you are likely to be contagious, how to protect family members or colleagues, and which symptoms would mean the illness is turning into something more serious, such as pneumonia.

When antibiotics help, and when they do not

Most coughs, including most cases of acute bronchitis, are caused by viruses. Antibiotics do not kill viruses, will not make you recover faster, and can cause side effects such as diarrhea and allergic reactions while adding to antibiotic resistance.

Antibiotics are appropriate when there are signs of bacterial pneumonia, bacterial sinusitis lasting more than ten days or worsening after initial improvement, strep throat confirmed by testing, or whooping cough. When a cough is viral, we focus on what actually helps: rest, fluids, honey for adults, fever relief, and inhalers if your airways are tight. If you need chest imaging or more detailed tests, we can refer you to a hospital.

For a cough that persists beyond eight weeks, the common causes in adults are postnasal drip, asthma and acid reflux. Each has its own treatment, and identifying the right one usually settles the cough. Persistent coughs in smokers, or those with weight loss or blood, need a chest X-ray and sometimes specialist referral.

Red flags: go to an ER or call 119

Seek emergency care immediately for:

If you are unsure whether symptoms are serious enough for an emergency room, it is safer to go. Hospital emergency departments in Seoul are open around the clock, and many larger hospitals have international patient support.

• Severe shortness of breath, struggling to speak, or blue lips
• Chest pain or pressure
• Coughing up more than a small streak of blood
• Confusion, extreme drowsiness or fainting
• High fever with a stiff neck or a new rash
• Oxygen saturation below about 94 percent on a home monitor, if you have one