There are several natural remedies that can help treat pigmentation:
1. Lemon juice: Lemon juice contains natural bleaching properties that can help lighten pigmentation. Apply fresh lemon juice on the affected area and leave it on for 5-10 minutes before rinsing it off with water. Do this once a day for a few weeks.
2. Aloe vera: Aloe vera contains a compound called aloesin that can help reduce pigmentation. Apply fresh aloe vera gel on the affected area and leave it on for 20-30 minutes before rinsing it off with water. Do this twice a day for a few weeks.
3. Turmeric: Turmeric contains curcumin, which has anti-inflammatory and antioxidant properties that can help reduce pigmentation. Mix turmeric powder with milk to form a paste and apply it on the affected area. Leave it on for 20-30 minutes before rinsing it off with water. Do this once a day for a few weeks.
4. Papaya: Papaya contains an enzyme called papain that can help exfoliate the skin and reduce pigmentation. Mash a ripe papaya and apply it on the affected area. Leave it on for 20-30 minutes before rinsing it off with water. Do this once a day for a few weeks.
5. Green tea: Green tea contains antioxidants that can help reduce pigmentation. Brew a cup of green tea and let it cool down. Dip a cotton ball in the tea and apply it on the affected area. Leave it on for 10-15 minutes before rinsing it off with water. Do this once a day for a few weeks.
Note: It is important to do a patch test before trying any of these remedies to make sure you are not allergic to any of the ingredients. Also, it is important to use sunscreen to protect your skin from further damage.