I have polycythemia vera. is it ok for me to wear extremely tight jeans or am i more likely going to get dvt or blood clots?

Should be fine: Tight jeans is not going to add your risk for dvt- as long as you are active and not becoming sedentary. Follow up with your doctor and maintain your hemoglobin level with phlebotomy.

Probably OK: It is unlikely that jeans can ever create the degree of compression needed to affect circulation, and we in fact use compression to help treat patients with dvt.

Agree that probably: Ok...Keep well hydrated & follow closely with your physician.