Asian Plantain (Plantago asiatica) has a long history of use in traditional medicine systems, particularly in East Asia. Traditional Chinese Medicine (TCM) utilizes the seeds and leaves of Plantago species for various ailments, including inflammation, infections, and as a "clearing heat" remedy. In some folk practices, plantain preparations (such as decoctions or poultices) have been applied for earaches or mild ear infections, usually based on its reputed anti-inflammatory and antimicrobial properties.

However, there is very limited direct scientific evidence supporting the efficacy of Asian Plantain specifically for ear infections or earache. Most modern research on Plantago asiatica focuses on its general anti-inflammatory, antimicrobial, and wound-healing properties in vitro or in animal models. There are no robust clinical studies or trials demonstrating safety or effectiveness for treating otitis media or other specific ear conditions in humans.

In summary, the use of Asian Plantain for ear infection or earache is justified primarily by traditional use, with weak or indirect evidence from modern science. It should not replace standard medical care for ear infections, especially in children, due to the lack of high-quality clinical data.