What are the uses for crystal violet in medical field?

Crystal violet is primarily used in the medical field as a dye for staining biological tissues, particularly in histology and microbiology. It helps visualize cells and microorganisms under a microscope, aiding in the diagnosis of infections, such as in the Gram staining process to differentiate bacterial types. Additionally, it has antifungal properties and has been used in some topical treatments for skin infections and conditions. However, its use has declined due to potential toxicity and the availability of safer alternatives.