birth control
"I started taking this pill when I was 18, and I'm now 22.  I have had no really awful side effects... no weight gain, no bloating, bad eye sight etc... but one thing I did notice right when I switched from Desogen is that the skin on my face, especially around my eyes, began to develop some red splotches.  At first I thought it was acne because they were like little red bumps.  Those eventually went away, but now I have to admit that the skin on my face is pretty significantly discolored... lots of dark patches as the possible side effects listed tells you.  But I've heard that there are skin lighteners that can be applied and with proper sunscreen use (which I'm bad at), the dark patches will go away and won't come back."