Hi..thanks for your query
There is a possibility that you have developed Melasma
This condition is aggravated by UV light sources, sun maximally.
Please wear a sunscreen with broad spectrum like Cetaphil
UVA UVB defense during the day time.It is important to use umbrella and reapply the sunscreen 4-6 hourly.
You can use a combination of hydroquinine, mild steroid and Retinoid
on the patches at night for 6 weeks. following which you should review for the further line of therapy .Start with 1/2 hour application at night and gradually if you are comfortable with it,increase the application time to overnight.
Melasma is a very chronic recurrent condition.hence I would advise you to start the treatment by visiting a dermatologist
soon. There are procedures like chemical peels
which can be done to aid in faster resolution and maintenance of the clarity achieved.
Hope this is helpful ...take care!