Chinese Quince (Chaenomeles speciosa) has a longstanding use in traditional Chinese medicine (TCM), where it is known as "Mu Gua." In TCM, Chinese Quince is primarily used to soothe the joints, relax muscles, and alleviate digestive issues. However, it is sometimes included in herbal formulations intended to address symptoms associated with rhinitis, such as nasal congestion or inflammation, due to its perceived ability to dispel wind-dampness and harmonize the stomach. These uses are based on traditional principles rather than direct evidence of efficacy for rhinitis specifically.

There is minimal scientific research directly investigating the effects of Chinese Quince on rhinitis. Most available studies focus on its anti-inflammatory and antioxidant properties, and some in vitro studies suggest it may inhibit histamine release or reduce inflammatory mediators. However, there is no robust clinical evidence supporting its effectiveness in treating or managing rhinitis in humans. The use of Chinese Quince for rhinitis remains largely grounded in traditional practice rather than validated through modern clinical trials.

In summary, the use of Chinese Quince for rhinitis is justified primarily by tradition, with only weak indirect scientific rationale and insufficient clinical evidence to support its effectiveness for this specific condition.