My upper lip swells up every few days and becomes normal after a few hours. It comes along with some itching in the area. My general health is good.
Q. What are the blood tests I should undergo to find out what is wrong with me?
Problems effecting the lips are often troublesome and indeed hard to diagnose. However, such problems are rarely caused by STD's of any sort. if this were herpes or syphillis or any other STD that could be aquired through the oral tract believe me you'd know about it from very visable indicators- not a swollen lip. Also these would not occur on a 'every few days' basis.
This most likely sounds like a foreign body infection - i.e. an allergic reaction. The only real suggestion is that you go to the doctors where they can do a highly sensitive blood based allergy test which will diagnose the cause.
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