There is a tendency for any type of nasal drainage to be attributed to " sinusitis " in children. Especially in young children, "sinusitis" is a relatively rare cause for nasal drainage and congestion which is actually more commonly due to viruses and enlarged adenoids . The reason why sinuses play a relatively minor role in nasal drainage and congestion is because sinuses are not fully developed in children. It probably is not until around the age of 7 years old th…