I have this condition where initially i feel a very little projection under my armpit (like when a pimple starts to come on face).. which hurts little bit when gets in contact with anything.. then it gets bigger and turns red and very soft and squishy like something liquid inside.. at that time it hurts like hell with just a little touch.. afterwards it releases some liquid with little blood then dries off and goes away.. this keeps coming back in almost every 10-15 days..then stays for 3-4 days.. i am getting a little worried now.. can it be something serious? Is this common? And how to get rid of this? I drink lots of water daily.. so fluid intake shouldnt be the problem i guess.. please guide me..