The common cold starts with a sore throat, runny nose, and sneezing, then progresses through nasal congestion, coughing, and mild body aches over the next several days. Symptoms typically peak around days 2 to 3 after infection and last anywhere from 7 to 10 days total. Here’s what to expect at each stage, how cold symptoms differ from the flu and allergies, and what to watch for in babies.
The Full List of Cold Symptoms
A cold can produce a surprisingly wide range of symptoms, though not everyone gets all of them. The CDC lists the following as the most common signs:
- Runny nose
- Nasal congestion
- Sneezing
- Sore throat
- Cough
- Headache
- Mild body aches
- Low-grade fever (more common in children than adults)
Most of these symptoms are actually caused by your immune system fighting the virus, not by the virus itself. When your body detects an intruder in the nasal passages, it triggers inflammation and ramps up mucus production to trap and flush out the virus. That’s why your nose runs, your throat gets irritated, and you sneeze. The mild aches and low fever are signs your immune system is actively working.
How Symptoms Progress Day by Day
Cold symptoms don’t hit all at once. They unfold in a fairly predictable pattern over about 10 days.
In the early stage (days 1 through 3), the first thing you’ll typically notice is a scratchy or sore throat, followed quickly by a runny nose and sneezing. Nasal discharge is usually thin and clear at this point. This is when symptoms climb toward their peak, and it’s also the window when you’re most contagious.
During the middle stage (days 4 through 7), congestion tends to take over. Your nasal mucus may thicken and turn yellow or green. This color change is normal and doesn’t automatically mean you have a bacterial infection. Coughing often picks up during this phase as mucus drains down the back of your throat. You might feel generally run down, with mild headaches or body aches.
By the late stage (days 8 through 10), most symptoms are fading. You may feel mostly better but still have a lingering cough or some residual congestion. A post-cold cough can actually hang around for up to two months after the infection clears, which is surprisingly common and usually not a sign of anything serious on its own.
Cold Symptoms in Babies and Toddlers
Babies can’t tell you their throat hurts, so cold symptoms show up differently. The first sign is usually a stuffy or runny nose, with mucus that starts clear and may thicken to yellow or green over the following days. Beyond that, watch for sneezing, coughing, fussiness, trouble sleeping, and reduced appetite. Babies often have difficulty nursing or taking a bottle because they can’t breathe well through a congested nose.
Fever is more common in young children with colds than in adults. If your baby is 3 months or older and seems to have ear pain, is unusually cranky, or has very low energy, that’s worth a call to your pediatrician. A baby of any age who refuses to drink fluids needs prompt medical attention, since dehydration can develop quickly in infants.
Cold vs. Flu: Key Differences
Colds and the flu share several symptoms, which makes them easy to confuse. The biggest difference is how they start. A cold builds gradually over a day or two, while the flu tends to hit suddenly. You might feel fine in the morning and be flat on the couch by afternoon with the flu.
Severity is the other major divider. Cold symptoms are generally mild. Flu symptoms are more intense: higher fevers, significant muscle and body aches, deep fatigue, and chills. Both can cause cough, sore throat, and congestion, but with a cold these tend to be the main event, while with the flu they’re often overshadowed by the full-body misery. If your body aches are keeping you in bed and your fever is above 101°F, you’re more likely dealing with the flu than a cold.
Cold vs. Allergies: How to Tell Them Apart
Allergies can mimic a cold almost perfectly, especially seasonal ones that cause sneezing, a runny nose, and congestion. A few features help you sort them out.
Itchy eyes are the clearest giveaway. They’re a hallmark of allergies and almost never happen with a cold. Duration matters too: a cold typically resolves within 3 to 10 days, while seasonal allergies can drag on for weeks as long as you’re exposed to the trigger. Colds also tend to come with a sore throat and mild body aches, which allergies rarely cause. And if your symptoms follow a pattern (every spring, every time you’re around cats), that points strongly toward an allergic reaction rather than a virus.
When Symptoms Signal Something More Serious
Most colds resolve on their own without complications. But sometimes a cold weakens your defenses enough for a secondary bacterial infection to take hold, leading to sinusitis, bronchitis, or pneumonia.
The pattern to watch for is improvement followed by a setback. If your symptoms start getting better and then suddenly worsen, or if a fever returns after it had already gone away, that’s a sign something else may be developing. Symptoms that persist beyond 10 days without any improvement also warrant attention. A cough that produces thick, discolored mucus along with chest pain or shortness of breath could indicate a chest infection rather than a lingering cold.