Thanks for the query,
This hyper pigmentation can be removed by using skin lightening creams.
Various creams are available like melalite xl, lookbrite, Lumaglow etc.
You can take any of them.
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.
Peeling is a good option.
You can go for glycolic acid
peel, once a month.
Both these can be combined.
For the small boil you can use an antibacterial cream like mupirocine.
Let me know if you have any doubt.