I do not know your ethnic background but in darker skinned people; from India, Spain, Italy for example tend to have more facial hair than those from Northern Europe or Asia. It is possible you just have a tendency toward more hair in your body's makeup but it just started to appear.
There are some cases where hirsutism can be a sign of a deeper medical condition. If you simply have a little hair in places you with it wasn't, it is probably just a cosmetic issue that you can either accept or have taken care of. If you have any other issues that seem to have developed suddenly including weight gain, you may want to consult your doctor just to rule out these other conditions which can be serious.
Here is a website where you can learn more about hirsutism so get an idea whether you have the annoying kind, or a more serious issue going on...
This one tends to use a lot of medical terminology and can be tricky to understand.
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