A common symptom of the common cold is a runny or congested nose. This symptom occurs due to inflammation of the nasal passages caused by viral infections. As the body responds to the virus, it produces excess mucus, leading to a runny nose, while congestion can result from swelling within the nasal tissues. Additional symptoms typically associated with a cold include sneezing, coughing, a sore throat, and mild fatigue. While uncomfortable, the common cold is usually mild and self-limiting, with recovery occurring within a week or two. Staying hydrated and resting can help alleviate symptoms.