It usually starts on a Sunday night. The scratchy throat. The sniffle you keep hoping is just dust. By Tuesday you're texting me a photo of a thermometer reading and asking whether you need an antibiotic, a test, or just chicken soup and patience.
That moment — the "is this serious or is this just a cold?" moment — is one of the most common reasons patients reach out to me. An acute upper respiratory infection covers a big family of illnesses: the common cold, influenza, COVID-19, sinus infections, and the parade of seasonal viruses that move through every household in Los Angeles each winter. Most are viral. Most get better on their own. But "most" is not "all," and knowing the difference is the whole point of having a doctor you can actually reach.
What is an acute upper respiratory infection, exactly?
It's an infection of your nose, throat, sinuses, or voice box that comes on quickly and tends to run its course in a week or two. The "upper" part matters — it means the infection lives above your lungs, in the airways you can mostly feel.
Typical signs are familiar to all of us: congestion, sore throat, sneezing, cough, low fever, body aches, fatigue. Annoying, yes. Dangerous, usually not. The trouble is that a cold, the flu, and COVID-19 can look nearly identical on day one, and they don't all get treated the same way.
Do I need an antibiotic for a cold or the flu?
Almost certainly not. The vast majority of upper respiratory infections are caused by viruses, and antibiotics do nothing against a virus. I often tell patients that taking an antibiotic for a cold is like using an umbrella against an earthquake — wrong tool, wrong problem, and it carries its own side effects.
There are real exceptions. A bacterial sinus infection, strep throat, or a secondary infection on top of a viral one may genuinely call for antibiotic therapy. That's a judgment I'd rather make after actually examining you, not by guessing over text. When antibiotics are truly needed, I'm glad to prescribe them. When they're not, saying no is part of taking good care of you.
When does a respiratory infection actually need prompt evaluation?
Get seen quickly if your symptoms are severe, fast-moving, or hitting your breathing. Some warning signs I don't want anyone to sit on:
- Trouble breathing, chest tightness, or shortness of breath at rest
- A fever that's high, won't break, or keeps climbing after a few days
- Symptoms that improve and then suddenly get worse again
- Confusion, a stiff neck, or severe one-sided face or sinus pain
- Dehydration, or being too sick to keep fluids down
There's also a timing reason to call early. Antivirals for the flu and for COVID-19 work best when they're started in the first day or two. If you're a candidate, prompt antiviral therapy can shorten the illness and lower the odds of a rough course — but the window is short, which is exactly why a prompt visit beats waiting it out.
Why does this matter more if I have asthma, COPD, or another lung condition?
Because a "simple" cold isn't always simple when your lungs are already working hard. A run-of-the-mill virus can trigger a flare in someone with asthma or COPD, turning a minor illness into a wheezing, breathless week. I watch these patients more closely and lower my threshold to see them in person.
The same goes for older adults, pregnant patients, and anyone with diabetes, heart disease, or a weakened immune system. If that's you, please don't tough it out alone. Reach out early so we can stay ahead of it.
What can I do at home in the meantime?
For most viral infections, the unglamorous basics genuinely help. Rest. Fluids. A humidifier or a steamy shower for congestion. Saltwater gargles for a raw throat. Honey for a nighttime cough. Over-the-counter fever and pain relievers, used as directed, for the aches.
Here's what I look for as I'm reassuring someone over the desk: are you slowly trending better, or quietly trending worse? A cold that peaks around day three and eases by day seven is doing exactly what it should. A cold that's still escalating on day ten is telling us something else.
If you're not sure which one you're living through, that's not a bother — that's the call I want you to make.
I built my practice around being reachable on the day you actually feel sick, not three days later. If you're fighting something and you're not certain whether it's a wait-and-rest situation or a get-seen-now situation, reach out and let's sort it out together. I'd much rather hear from you early than have you wonder alone.