Tiny purple dot at about the center of the camera

[AhmadSorour]

Hero guys.. I'm facing a problem..i have a very small purple dot when I take any photo..this thing has appeared since 15th November ( 2 days ago ) I checked the previous photos with dates of 14th November and before it hadn't that dot...the phone didn't fall on the ground at all at that period of time...and I can't see that the camera is scratched...so any ideas? Please help me!
Ty
Edit:
There is a photo of the purple thingy...
http://imgur.com/lgCxB3s