How can I effectively treat and prevent calluses from forming on my fingers while playing the guitar?

To effectively treat and prevent calluses from forming on your fingers while playing the guitar, you can try using a moisturizing cream to keep your skin soft, filing down calluses gently with a pumice stone or emery board, and taking breaks during practice sessions to give your fingers time to rest and heal. Additionally, using proper technique and ensuring your guitar strings are not too hard can help prevent calluses from forming.