Could my birth control pills be causing my vein pain?

Possibly: Use of birth control pills can increase your risk of blood clots, particularly if you are a smoker. It is possible you may be experiencing pain from venous valve problems which can make legs feel heavy and tired. See your doctor if symptoms persist.

Maybe: As dr. Reed said, you can certainly get vein pain because your veins aren't working properly. Birth control pills probably won't make that pain worse. If, however, you are starting to get a superficial or deep vein thrombosis (clot) in one of your veins because of the pill, that can certainly be painful. If you have redness, swelling, and/or a hard place where the pain is, see a doctor right away.