Lungwort (Pulmonaria officinalis) has a long history of traditional use in herbal medicine, particularly in Europe, where it has been employed for various respiratory complaints, including supporting the sinuses. Its historical use is rooted in the Doctrine of Signatures, a medieval belief that plants resembling certain body organs were thought to be beneficial for those organs. The spotted leaves of lungwort were believed to resemble diseased lungs, leading to its use for respiratory ailments such as coughs, bronchitis, and sinus issues.

Despite its widespread traditional use, modern scientific evidence supporting lungwort for sinus support is minimal. There are few human clinical studies examining its effectiveness for sinus health specifically. Some laboratory research has identified the presence of compounds such as mucilage, flavonoids, and saponins in lungwort, which could theoretically have soothing, anti-inflammatory, or antimicrobial properties. However, these findings are not directly linked to clinical outcomes in sinus health, and the bulk of available data is anecdotal or based on historical texts rather than rigorous scientific investigation.

In summary, while lungwort is commonly used in traditional herbal medicine for respiratory and sinus support, there is little scientific validation for its efficacy in this regard. Its use for the sinuses remains primarily traditional.