Water in headlight

2000 Civic Sedan

My drivers side headlight has a whole bunch of water droplets on the inside, mostly around the turn signal. I've had this happen before but it usually has gone away after a day or so, this water has stayed there for over a week. Does anyone know what the problem is? Is there any place that I need to seal in order to keep the water out? Or is this just normal? Any insight is appreciated, thanks.

check to see if the headlight is tightend down and then look for a crack or chip. moisture is leaking in and it's a common thing.