Can a cold go away in 3 days?

Yes, it's possible for a cold to go away in just 3 days, but it really depends on the individual and the severity of the cold. Some people might start feeling better within a few days, while others might take longer to recover. Generally, cold symptoms can last anywhere from a few days to a couple of weeks. 

To help speed up recovery, it's important to get plenty of rest, stay hydrated, and try over-the-counter remedies like decongestants or pain relievers if needed. Additionally, you can soothe symptoms by drinking warm liquids like tea or broth, using a humidifier to ease congestion, and gargling with salt water to soothe a sore throat. However, if your symptoms persist or worsen, it's always a good idea to consult with a healthcare professional.