I frequently get large painful cysts  on my face and they are filled with alot of blood and sometimes watery.  I don't know if stress seems to bring these on.  I think so.  I am 42 years old and never really had a big poblem with acne.  These are very embarrassing and painful.  I usually prick them with a needle to relieve some of the blood and pressure but it doesn't always help.  The amount of blood that comes out of these cysts is unbelievable.  I thougt maybe it would be a sign of something more than acne such as high blood pressure?  Or I have not ruled out a herpes outbreak on my face or even an allergy to something.  I work in a dental office  3 days a week and it seems like I get them when I work.  Maybe stress or an allergic reaction to something.  I told my physician and she gave me a testosterone blocker which I don't take to get rid  of it.  I'm afraid of the side effects and that it will make me tired.  I have taken phentermine for the past year on and off.  Maybe twice a week at this point and I wondered if this could be related to that medication but when I don't take it the symptoms still occur.  Any suggestions?