To lighten the skin under your legs and underarms, you can try the following home remedies:

Lemon Juice: Lemon juice contains natural bleaching properties that can help lighten dark areas of the skin. Apply fresh lemon juice to the affected areas, leave it on for about 15 minutes, and then rinse it off with water. Repeat this remedy a few times a week.

Potato Slices: Potatoes have natural bleaching properties and can help lighten dark skin. Cut a potato into thin slices and rub them directly onto the dark areas of your skin. Leave the potato juice on for about 15-20 minutes, then rinse off with water. Repeat this remedy a few times a week.

Baking Soda and Water: Create a paste by mixing baking soda with water to form a thick consistency. Apply the paste to the dark areas and gently scrub in circular motions for a few minutes. Rinse off with water. Repeat this remedy once or twice a week.

Aloe Vera Gel: Aloe vera has skin lightening and soothing properties. Apply fresh aloe vera gel to the affected areas and leave it on for about 20 minutes before rinsing off. Repeat this remedy daily for best results.

Cucumber Slices: Cucumber has cooling and skin-lightening properties. Place cucumber slices on the dark areas of your skin and leave them on for about 15-20 minutes. Rinse off with water. Repeat this remedy daily or a few times a week.

Natural yogurt: Yogurt contains lactic acid, which can help lighten dark areas. Apply plain, natural yogurt to the affected areas, leave it on for about 15-20 minutes, and then rinse off with water. Repeat this remedy a few times a week.

Remember to perform a patch test before using these remedies to ensure you don’t have any allergic reactions. Consistency is key, as it may take time to see noticeable results. Additionally, it’s important to protect the skin from excessive sun exposure and regularly moisturize the area to maintain healthy, even-toned skin.