Civic EG

hi, was driving the last couple of days and notices my brakes seem a bit on and off under braking, now getting into work today i noticed a squiling noice .... looking at my alloy my front passenger alloy has a random amount of brake dust onit.

so im thinking my passengers brake pad is constintly ingaged for some reason i havent done any thing with them and there standered so i dont get why there playing up on me?

any ideas would be appreciated!

calipers will begin to seize up after they get really old.
Jack up the car and spin the frnt wheels by hand to see if one is harder to spin than the other.

That will be the sticking caliper