Most colds and flu resolve at home with rest and fluids. Go to an emergency room for difficulty breathing, chest pain or pressure, confusion, persistent dizziness, a fever that will not come down, an inability to keep fluids down, or symptoms that improved and then suddenly got worse. That last pattern often signals a secondary bacterial infection such as pneumonia.
If you think you have influenza, there is one time-sensitive point: antiviral treatment works best within 48 hours of symptoms starting. Do not wait out the weekend to see how it goes.
Arizona’s season is real, and it has a local shape
People assume a warm climate means no flu season. It does not. Arizona has a clear respiratory illness season running roughly from October into March, and a few factors here make it distinctive.
Snowbird season overlaps with flu season. Hundreds of thousands of seasonal residents arrive in the Valley from October onwards, bringing respiratory viruses from every part of the country and Canada. Fountain Hills, Rio Verde, and the surrounding communities see a genuine population change at exactly the point when transmission picks up.
Everyone moves indoors. In summer we cluster in air conditioning; in winter our visitors cluster in restaurants, clubhouses, and community events. Respiratory viruses spread in shared indoor air, and that is where we all are.
Dry air works against you. Very low humidity dries the mucous membranes that trap viruses before they reach your lungs, which plausibly makes infection easier and makes a cough linger.
Our older population is more exposed. Adults over 65 account for the large majority of flu hospitalisations and deaths nationally, and our community skews older than the state average. This is why vaccination locally matters more than the raw numbers suggest.
Flu, cold, RSV, or COVID?
There is genuine overlap, and testing is the only way to be certain. That said:
| Common cold | Influenza | RSV | COVID-19 | |
|---|---|---|---|---|
| Onset | Gradual, over days | Abrupt — often a specific hour | Gradual | Variable |
| Fever | Rare or mild | Common, often high | Common in children | Common |
| Body aches | Mild | Prominent, often severe | Mild | Common |
| Exhaustion | Mild | Sudden and profound | Moderate | Common, can linger |
| Cough | Mild to moderate | Dry, can be severe | Wheezing, prominent | Common, often dry |
| Runny nose, sneezing | Prominent | Sometimes | Prominent | Common |
| Headache | Uncommon | Common | Uncommon | Common |
| Loss of taste or smell | Uncommon | Uncommon | Uncommon | Possible |
| Riskiest for | Generally mild | Over 65, pregnancy, chronic illness | Infants and over 65 | Over 65, chronic illness |
The most useful practical distinction: influenza arrives abruptly with body aches and exhaustion. People with flu often remember the hour they became ill. People with colds rarely do.
RSV deserves particular attention in two groups. In infants it can cause bronchiolitis — watch for wheezing, rapid breathing, ribs pulling in with each breath, flaring nostrils, poor feeding, or pauses in breathing, all of which need urgent assessment. In adults over 65 it can be as serious as influenza and is widely under-recognised. There are now RSV vaccines for older adults and protective antibody options for infants; both are worth a conversation with us.
Go to the emergency room for
Adults:
- Difficulty breathing or shortness of breath at rest
- Chest pain or pressure
- Confusion, or a sudden change in alertness
- Persistent dizziness or fainting
- Not urinating, or clear signs of dehydration
- Severe weakness or inability to stand
- Fever above 103°F (39.4°C) that will not come down, or any fever lasting more than three days
- Symptoms that improved and then returned worse — classic for pneumonia following flu
- A worsening chronic condition — asthma, COPD, heart failure, diabetes
- Coughing up blood
Children — additionally:
- Rapid or laboured breathing; ribs or the area below them pulling in with each breath
- Bluish lips or face
- Dehydration — no wet nappy for eight hours, no tears, sunken eyes
- Not waking or not interacting; unusual floppiness
- Irritability so severe the child does not want to be held
- Fever above 104°F (40°C), or any fever in an infant under three months
- A fever with a rash
- Seizure
Managing it well at home
Rest genuinely matters — your immune system does its work while you are not making demands on your body. Push fluids steadily: water, broth, diluted juice, or an oral rehydration solution if you have been vomiting.
A humidifier or a steamy bathroom helps considerably in our dry air, especially at night. Saline nasal spray or rinses are safe, cheap, and effective for congestion. Honey is a genuinely evidence-supported cough suppressant for adults and children over one year old — never for infants under one, because of the botulism risk.
Use paracetamol or ibuprofen for fever and aches according to the label, and never give aspirin to children or teenagers because of the risk of Reye’s syndrome. Check combination cold remedies carefully so you do not double-dose paracetamol.
Two points people get wrong: antibiotics do nothing for viral illness, and taking them unnecessarily causes side effects and resistance without helping you. And over-the-counter cough and cold medicines are not recommended for children under six — they have not been shown to help and carry real risks.
Stay home while you have a fever and for at least 24 hours after it resolves without medication. Cover coughs, wash hands with soap and water, and if you must be around vulnerable people, wear a mask.
Prevention that is worth the effort
Get vaccinated. Influenza vaccination each autumn, ideally by the end of October; COVID-19 vaccination as currently recommended; RSV vaccination if you are 60 or over, or pregnant; and if you are 65 or over, ask us about pneumococcal vaccination too, because pneumonia after flu is what actually causes many of the serious outcomes. Flu vaccination does not always prevent infection, but it reliably reduces severity and hospitalisation — which is the outcome that matters.
Beyond that: wash hands properly, keep indoor humidity reasonable, sleep enough, and if you are a seasonal resident, get your vaccinations before you travel rather than after you arrive.
What we can do
At our Medical Clinic we can test for influenza, COVID-19, RSV, and strep throat, and — critically — prescribe antivirals within the 48-hour window where they do the most good. Same-day appointments are usually available: (602) 671-7981. This is also the right place for vaccinations, and for anyone with a chronic condition who wants a plan for the season.
At our Emergency Room, open 24 hours, we have chest X-ray and CT imaging plus a full laboratory on site — so if a flu has become pneumonia, or a child’s breathing is genuinely laboured, we can establish that immediately rather than sending you elsewhere for imaging. ER: (602) 671-7990.
Where to go
Call 911 for severe breathing difficulty, bluish lips, confusion, unresponsiveness, or a seizure.
Come to our Emergency Room for any red flag above — 9700 N. Saguaro Blvd, open 24 hours, no appointment.
Book our Medical Clinic within 48 hours of flu-like symptoms starting, for vaccinations, and for illness that is unpleasant but not alarming.
Related reading
- Shortness of Breath You Should Never Ignore
- Adult Vaccines: What You Need, and the Myths Worth Dropping
- Why Living Near an Emergency Room Matters
Sources
- CDC — Flu symptoms and complications
- CDC — RSV in infants and young children
- CDC — Cold versus flu
- Arizona Department of Health Services — Influenza surveillance