Online Doctor's Note for a Cold

How long a cold usually lasts

A cold is a viral infection of the upper airways, and more than 200 different respiratory viruses can cause one, most often rhinoviruses (CDC). Symptoms tend to peak two to three days after you’re infected and usually clear up in under a week. Adults get an average of two to three colds a year, which the CDC notes makes colds one of the most frequent reasons for missed school and work. Typical symptoms include a runny or stuffy nose, sneezing, sore throat, cough, headache, mild body aches, and a low-grade fever, more common in adults than a high one.

Colds spread mainly through droplets from coughing and sneezing, or by touching a contaminated surface and then your eyes, nose, or mouth, which is one reason staying home while you’re contagious helps classmates and coworkers as much as it helps you rest.

Signs it might be more than a cold

Cold-like symptoms can also come from influenza, COVID-19, or RSV, and those three are more likely to lead to severe illness, hospitalization, or complications, especially for infants, older adults, and people with underlying conditions (CDC). If you suspect flu or COVID-19, especially if you’re at higher risk, testing is a reasonable next step, since antiviral treatment works best when started soon after symptoms begin. Complications from any of these viruses can include an ear or sinus infection on the milder end, or, less often, an asthma flare, bronchitis, or pneumonia. None of that means a routine cold needs medical treatment; it’s a reason to pay attention if symptoms are unusually severe, get worse instead of better, or don’t fit the usual one-week pattern.

When it’s reasonable to go back to work or school

General CDC guidance for respiratory viruses gives a workable rule: you can typically return to normal activities once, for at least 24 hours, your symptoms are improving overall and you haven’t had a fever without fever-reducing medication. For the five days after that, added precautions, such as good hygiene or a well-fitted mask around others, are reasonable, since you can still spread a cold virus for a while after you start to feel better.

What the note covers, and what employers or schools usually ask for

Many workplaces and schools ask for documentation once a sick day stretches beyond one day, even for something as ordinary as a cold. The note from this service confirms that you reported cold-like symptoms and were advised to rest for specific dates. It doesn’t diagnose which virus caused it, and it doesn’t need to. Your employer or school can confirm the note is genuine, but only with your permission, since your medical details aren’t shared without your consent.