Thanks for the query,
You can use a skin lightening cream like,Skin lite cream or look brite. It is a peeling agent with steroid
The following should be procedure to use it.
1. Wash the affected area in evening around 7.
2. Dry it and apply cream all over the area.
3. Keep it for one hour.
4. Wash the area again.
5. Apply some moisturizing cream and sleep.
6. In morning apply a sunscreen with spf at least 30
Do this for a month, you will see the results.
It should not be continued for more than 6 months.
Steroid can cause thinning of skin.
Let me know if you have any other doubts.