I have been married for 25 years and so am quite sure it isn't an STD. My lips feel like I have been chewing on sunflower seeds for hours and I haven't eaten any. The visible part of my lips are pale but the back side looks irritated. They are slightly swollen and the back side of them are irritated, wrinkled, and red. Vaseline helps with the discomfort but it hasn't improved in 2 weeks.