I have had a medium sized fatty cyst on the top of my head for a long time. Recently I tried to pop it. It didn't do much, bled a little. Now a month or so later I noticed it was very tender, and there was a scab, so tonight I picked the scab off, and a lot of brownish fluid came out. No blood. I squeezed as much out as I could. Now the cyst is a bit smaller, but still tender. Does the brown fluid indicate that it's infected? I'm scared.