A minor cold with nasal congestion is likely caused by a viral infection leading to swelling of the nasal mucosa, and thus, blocking the nasal passages. For quick relief, we can initially take oral medications such as children's acetaminophen-diphenhydramine granules, etc., which can promote the contraction of the nasal mucosa. Additionally, antiviral oral solutions can be taken for antiviral treatment. Locally, a 3% sodium chloride solution can be used for nasal drops to promote the contraction of the nasal mucosa, or physiological seawater nasal drops can also be used for the same purpose. Furthermore, physiological saline can be used to wash the nasal cavity, and then a nasal aspirator can be used to clean the secretions inside the nasal cavity, which also helps to clear the nasal passages.