There are different types of benign brown spots. The unattractive and stubborn melasma has three main causes: genetics, age and sun exposure. There are also other factors that might contribute, such as stress, hormone, malnutrition, and weakened liver function. There are skincare products that you can use to help gradually diminish the brown spots. However, if one can combine it with other treatments, effectively getting rid of it in a considerably short time would be possible.