There are many people who have asked this question. It may be floaters that haunt you. Floaters are dark specks in the form of dots, circles, lines or cobwebs that appear to move across the field of vision. The floaters move with the eyes, so you usually cannot focus on them. When you take a shower, your eyes are filled with water vapor, in this situation, your eyes will move all the time, and you will see some stars or spot in front of you. In general, floaters are harmless but if a large number develop suddenly or if they seem to be much worse over a period of time, you should seek medical attention.