Things like skin discolouration and hyperpigmentation are very common although usually perfectly natural, for people who display signs of these conditions might not feel the same way, in fact they may suffer with some mental health concerns as a result of how the conditions make them feel about themselves.
In South East Asia (SEA) there is an obsession amongst young females with obtaining a lighter skin colour, usually things like this are passed down by generations however, when it comes to the desire to change skin colour in SEA this is a reasonably new trend that has come about over the last decade or so.
There is nothing cultural about the desire to use whitening cream produce (called รับผลิตครีมผิวขาว in Thai), although some people you speak with would say that the want is based upon a seed that was planted that told people, the whiter your skin is then you are probably from a more privileged background.
So, asides from skin conditions you have an already formed customer base who will happily buy skin whitening products purely for the sake of vanity
In SEA the climate is incredibly dry and hot, subsequently there are a large proportion of women and men who suffer from some kind of skin condition that may affect pigmentation and or other visual effects.
With a skin condition, there is more to consider because, some of the conditions cause discomfort and pain meaning that a different type of cream might be needed depending upon the individual and their condition. Not good for them, but great for you if you are in the business of skin care.
This might be dodgy ground to step upon, but it seems only practical that people who have an obsession with turning their skin a lighter shade of white are suffering from some kind of mental health concerns.
When it comes to those who suffer with medical conditions, the chances are some will suffer with some severe depression and anxiety, so, your product could be just the thing that they need in order to move past the self-consciousness that comes with worrying about how you look as well as the physical irritations and discomforts.
Business is looking good.
If you are based in somewhere like Thailand then, finding customers will be absolutely no problem at all, you just need to create a branding and a unique feature of your business that will set you apart from the other skin care providers.