The use of Common Monkey Flower (Mimulus guttatus) for emotional sensitivity is justified primarily by tradition, specifically within the Bach flower remedy system. Developed by Dr. Edward Bach in the 1930s, Bach flower remedies are a form of alternative therapy that utilize dilutions of flower essences, including Mimulus, to address emotional and psychological states such as fear, shyness, and hypersensitivity. According to Dr. Bach and subsequent practitioners, Common Monkey Flower is believed to help individuals who are overly sensitive to external influences or easily overwhelmed by everyday situations.

Despite its popularity in alternative and holistic circles, there is currently no robust scientific evidence to support the efficacy of Common Monkey Flower or Bach flower remedies in general for treating emotional sensitivity or any other psychological condition. Systematic reviews and clinical studies examining Bach flower remedies have generally failed to demonstrate effects beyond placebo. As such, the use of Mimulus for emotional sensitivity relies on anecdotal reports and traditional practice rather than empirical validation.

In summary, while Common Monkey Flower is traditionally used to support emotional sensitivity, its use is not backed by scientific research, and therefore the evidence supporting its efficacy is very limited.