i get this too. here are some things i have heard of and some i have used that can help.
certain kinds of birth control pills one is yasmin i believe and i cant remember the other one but i can get the name if you want it.
antibotic called doxcycline, it is very cheap (here in US anyway) but you could get worse before you get better it usually takes at least 3 months before you can be cured. i have used this for cyst and just reg. acne it does work for me.
ACV- when i have a real painful one i will lance it with a needle diabetics use to prick their fingers, there very sharp , small and sterile ( i dont suggest this though for everyone) then after i lance it sometimes a clear oil will come out this is when i apply ACV on a sterile pad and leave it on my face (it will sting) i do this several times a day and leave the ACV on for at least and hour i even tape to face with med tape sometimes so i can still do my house work etc... they clear up in a week and usually with no mark left behind.
a face wash called capsiderm is a god send for most. you can only order from the internet, it is a wash so not a magic bullet but it does clear them up and cut down on this problem and to top it off it is all natural. cost about 20-25 dollars.
asprin mask
olive leaf (can find a health food/vit. store) taking internal
vit b5.
for stress try chamolie tea, lipton makes one that is all nautral in fact they several that are nautral and taste yummy and are good for you, like their peppermint, lemon and orange but try the chamolie for stress,
ts