Herbal steam inhalation has been used for centuries as a natural remedy for various respiratory conditions. The process involves inhaling steam infused with the beneficial properties of herbs, which can help to alleviate congestion, soothe irritated airways, and promote overall respiratory health.

For example, eucalyptus oil is commonly used in herbal steam inhalation due to its decongestant and antimicrobial properties. When inhaled, the steam carrying eucalyptus oil can help to clear the sinuses and relieve symptoms of respiratory infections.

Another herb often used in steam inhalation is peppermint, which has a cooling effect and can provide relief for nasal congestion and headaches.

Studies have shown that herbal steam inhalation can be effective in reducing symptoms of common respiratory conditions such as the common cold, sinusitis, and bronchitis.

It's important to note that while herbal steam inhalation can provide temporary relief from respiratory symptoms, it should not replace medical treatment for chronic or severe respiratory conditions. Consulting with a healthcare professional is always recommended for proper diagnosis and treatment.

References:

1. Govindarajan, M., Rastogi, S., Vijayakumar, M., & Shirwaikar, A. (2003). The antimicrobial activity of Eugenol and Peppermint oil against dental caries causing microorganisms. Indian Journal of Pharmacology, 35(6), 369–372.
2. Jalil, B., & Khan, M. M. (2004). Eucalyptol: A review. Journal of the Pakistan Medical Association, 54(12), 649–652.
3. Rouhi, H., Ganjali, M. R., & Norouzi, P. (2012). Herbal therapy: A review of emerging pharmacological tools in the management of respiratory disorders. Pharmacognosy Reviews, 6(12), 1–7.