You can try softening stains on your fingers with a mixture of water and vinegar, water and lemon, or even water and bicarbonate. These substances can help lighten dirty areas of the skin and the gaps between skin and nails.
Remember: While these methods can help lighten the appearance of stained fingers, they may not completely whiten them. If you're concerned about the discoloration of your fingers, it's always best to consult a dermatologist for professional advice.
