Chronic Flushing Of Lips

I know do how to exactly explain this anymore but here it goes.
For almost a year now i've been suffering from the oddest thing.
My top lip on the left hand side has had a particular spot that gets, whats seems to be "flush" after I do certain things sometimes. Sometimes how ever a smaller circular spot on my lower right lip gets flush. Four night ago I had a new spot on my lip get little red but this was more like a line and it was on right on my upper lip. This occurs only SOMETIMES after I do the following I Eat or Masturbate. As weird as that sounds.. There is no sore. It happens as goes away in a matter of a hour usually. And it can happen multiple times a day. Sometimes not at all. The thing that gets me is... It doesn't happen every time, and its always to a different degree of "flushness". Ive tested certain food too and it is inconsistent. Sometimes it happens when i eat tomato sauce sometimes it doesn't. Sometimes it happens when i eat soup, sometimes it doesn't.