Right leg feeling heavy, feels swollen but isn't. it hurts to bend it. recurrent pins and needles.

Paresthesias: Numbness and tingling in any extremity can be due to many reasons including sitting or standing in the same position for a long time, nerve injury, electrolyte abnormalities, vitamin deficiencies, etc. See your physician for evaluation. You might be referred to a neurologist. http://www.nlm.nih.gov/medlineplus/ency/article/003206.htm , http://www.ninds.nih.gov/disorders/paresthesia/paresthesia.htm