If you suspect you have a fungal infection under your fingernails, it is best to consult with a pharmacist or a healthcare professional for guidance on treatment options. Over-the-counter medications may be available at pharmacies, but for more severe infections, a prescription from a doctor may be necessary. It is important to maintain good skin hygiene, keep your hands dry, and avoid sharing personal care items to prevent the spread of the infection. Additionally, products like Emtrix may be worth trying for mild infections before seeking a prescription medication. Treating fungal nail infections can take time, so be patient and consistent with your treatment regimen.