Dirty fingers can potentially cause a yeast infection, especially if they come into contact with the vagina. Yeast infections are caused by an overgrowth of the fungus Candida, which can occur when the normal balance of bacteria and yeast in the vagina is disrupted. Touching the vagina with dirty fingers can introduce harmful bacteria or other irritants, disrupting the balance and allowing the Candida to grow unchecked. Additionally, yeast infections can also be spread through sexual contact, so it’s important to practice good hygiene and wash hands thoroughly before engaging in sexual activity. If you suspect you have a yeast infection, it’s important to see a healthcare provider for an accurate diagnosis and appropriate treatment.