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Using a cotton swab to avoid staining your hands, apply gentian violet to the affected area, usually once or twice a day or as directed by your doctor. Apply only to the affected area, and avoid surrounding healthy skin. Wash hands immediately after use unless the area being treated includes the hands.
Gentian violet ((GV) hexamethyl pararosaniline, also known as crystal violet, methyl violet) is a triphenylmethane dye with anti-bacterial, anti-fungal, anti-helminithic, anti-trypanosomal, anti-angiogenic and anti-tumor properties.
Gentian violet is an antiseptic dye used to treat fungal infections of the skin (e.g., ringworm, athlete's foot). It also has weak antibacterial effects and may be used on minor cuts and scrapes to prevent infection.