So I woke up with a blister looking bump on my butt cheek and I didn’t notice it at first because it didn’t hurt. I popped it and the fluid was clear. I then put neosporen on it and a band aid and proceeded doing errands but when I come back to shower (within 3 hrs) the blister had filled with fluid again. Why is it the cause of if I didn’t have it the night before this morning ?