Nasal congestion is a common symptom of a cold in children. When the congestion is severe, it can affect the child's daily life, making breathing uncomfortable and causing the child to become irritable. Therefore, it is important to address it promptly. First, ensure the child drinks plenty of water and you can apply a warm towel to the base of the nose. If there is a lot of nasal discharge, it should be cleaned out timely. You can use physiological saline to rinse the nasal cavity, thereby keeping the nasal passages clear. You can also give the child some cold medicine for children, which can completely relieve the nasal congestion. These are some specific methods on how to deal with nasal congestion during a child's cold, which you can try.