Difference(s) Between Stuck and Dead Pixel on iPhone 6 Screen and How to Fix It ?

Hello everyone,

The previous day, I discovered a pixel that shining in white on my screen. It appears only white or color backgrounds. I didn’t see them on dark background ( For example, the black one). As you see in pictures below this text, this pixel shining like a star on white background, seems to be light -transparent on color background. I could not solve it is stuck or dead pixel. I tried a pixel fixer for 20 minutes but it did not work. Can you help me? How can I fix them without go to Genius ? No Apple Store in my city.

Thanks for your answers….