Footlight San is effective for fungal infections of the feet, but it has to be analyzed on a case-by-case basis. As an old medicine for antifungal infections, the main ingredients of Footlight San are salicylic acid and benzoic acid, so its therapeutic effect is mainly keratin exfoliation, which is more effective for keratinized and scaly foot fungal infections. However, for vesicular or blister type foot fungal infections, Footlight San is not suitable for application in the acute stage. In addition, foot fungus is prone to recurrence, so the application of foot light dispersion may cause inadequate local de-fungalization resulting in recurrence, in addition to a certain degree of irritation, so foot light dispersion must be determined according to the specific typology of fungal infection and the specific symptoms of the patient to determine whether to apply.