Grown in back of knees. It be melanoma?

Have notieced this growth in the back of my knees for 2weeks. Before 2 days it was scaley or flaky and the outer flakes went off a little when I rubbed it. Now after bathing it seems the flakes are gone. Please someone knowledgeable tell me abt this. Can it be melanoma?? The pictures are in the link below [url=https://postimg.org/image/p0pu03ffn/][img]https://s5.postimg.org/p0pu03ffn/20170216_220610.jpg[/img][/url] [url=https://postimg.org/image/sllpjbjz7/][img]https://s5.postimg.org/sllpjbjz7/20170216_220621.jpg[/img][/url] [url=https://postimg.org/image/k4m78efab/][img]https://s5.postimg.org/k4m78efab/20170216_220945.jpg[/img][/url] [url=https://postimg.org/image/alciexrs3/][img]https://s5.postimg.org/alciexrs3/20170216_221016.jpg[/img][/url] [url=https://postimg.org/image/6dhq66qcj/][img]https://s5.postimg.org/6dhq66qcj/20170216_221021.jpg[/img][/url] [url=https:// The last three snaps are taken today the other ones are taken before 2 days when it was bit flaky. Please check