I assume you mean treating this yourself.
Sinus health is all about drainage; if they don't drain, problems persist. You can use a nasal decongestant
spray twice a day for 3-5 days; before and about 30 minutes after using it, rinse your nose with saline such as nasamist, entsol, or simply saline. If the sinus pressure increases, or the colored secretions last more than a week, see your doctor.